HuntingNut
HuntingNut
   Login or Register
HomeCommunity ForumsPhoto AlbumsRegister
     
 

User Info

Welcome Anonymous


Membership:
Latest: RichardZ
New Today: 0
New Yesterday: 0
Overall: 13126

People Online:
Members: 0
Visitors: 466
BOT: 1
Total: 467
Who Is Where:
 Visitors:
01: Forums
02: Forums
03: Forums
04: Forums
05: Your Account
06: Photo Albums
07: Forums
08: Your Account
09: Photo Albums
10: Forums
11: Forums
12: Forums
13: Forums
14: Forums
15: Your Account
16: Home
17: Home
18: Forums
19: Forums
20: Forums
21: Forums
22: Your Account
23: Forums
24: Forums
25: Forums
26: Forums
27: Forums
28: Forums
29: Your Account
30: Forums
31: Forums
32: Forums
33: Photo Albums
34: Home
35: Forums
36: Forums
37: Home
38: Forums
39: Forums
40: Forums
41: Forums
42: Forums
43: Forums
44: Forums
45: Your Account
46: Forums
47: Reloading Database
48: Forums
49: Forums
50: Forums
51: Forums
52: Forums
53: Forums
54: Forums
55: Forums
56: Forums
57: Your Account
58: Your Account
59: Forums
60: Forums
61: Forums
62: Forums
63: Forums
64: Photo Albums
65: Forums
66: Forums
67: Forums
68: Forums
69: Forums
70: Forums
71: Home
72: Forums
73: Forums
74: Forums
75: Forums
76: Forums
77: Home
78: Forums
79: Photo Albums
80: Forums
81: Forums
82: Forums
83: Forums
84: Forums
85: Forums
86: Forums
87: Forums
88: Forums
89: Forums
90: Your Account
91: Home
92: Home
93: Home
94: Forums
95: Home
96: Forums
97: Photo Albums
98: Forums
99: Home
100: Your Account
101: Forums
102: Home
103: Home
104: Forums
105: Forums
106: Forums
107: News
108: Forums
109: Forums
110: Forums
111: Forums
112: Forums
113: Forums
114: Photo Albums
115: Forums
116: Forums
117: Forums
118: Forums
119: Forums
120: Forums
121: Home
122: Forums
123: Forums
124: Forums
125: Forums
126: Forums
127: Home
128: News
129: Forums
130: Forums
131: Forums
132: Forums
133: Your Account
134: Home
135: Forums
136: Forums
137: Home
138: Home
139: Your Account
140: Your Account
141: Forums
142: Forums
143: Forums
144: Forums
145: Forums
146: Forums
147: Forums
148: Forums
149: Forums
150: Your Account
151: Home
152: Forums
153: Forums
154: Forums
155: Forums
156: Forums
157: Home
158: Photo Albums
159: Forums
160: Home
161: Your Account
162: Home
163: Home
164: Forums
165: Forums
166: Forums
167: Photo Albums
168: Your Account
169: Forums
170: Your Account
171: Forums
172: Forums
173: Forums
174: Forums
175: Home
176: Home
177: Forums
178: Forums
179: Forums
180: Forums
181: Forums
182: Forums
183: Photo Albums
184: Home
185: Forums
186: Your Account
187: Forums
188: Forums
189: Forums
190: Your Account
191: Your Account
192: Forums
193: Home
194: Forums
195: Your Account
196: Photo Albums
197: Your Account
198: Forums
199: Home
200: Forums
201: Your Account
202: Photo Albums
203: Your Account
204: Forums
205: Forums
206: Forums
207: Forums
208: Forums
209: Home
210: Forums
211: Your Account
212: Forums
213: Forums
214: Forums
215: Forums
216: Forums
217: Forums
218: Forums
219: Forums
220: Forums
221: Your Account
222: Forums
223: Photo Albums
224: Forums
225: Forums
226: Home
227: Home
228: Your Account
229: Forums
230: Forums
231: Your Account
232: Home
233: Forums
234: Forums
235: Forums
236: Forums
237: Forums
238: Forums
239: Forums
240: Forums
241: Forums
242: Forums
243: Forums
244: Forums
245: Forums
246: Forums
247: Forums
248: Photo Albums
249: Forums
250: Forums
251: Forums
252: Forums
253: Forums
254: Photo Albums
255: Your Account
256: Photo Albums
257: Forums
258: Your Account
259: Forums
260: Forums
261: Forums
262: Forums
263: Forums
264: Forums
265: Forums
266: Photo Albums
267: Forums
268: Home
269: Your Account
270: Forums
271: Forums
272: Forums
273: Photo Albums
274: Home
275: Photo Albums
276: Forums
277: Your Account
278: Forums
279: Forums
280: Your Account
281: Home
282: Forums
283: Forums
284: Forums
285: Forums
286: Your Account
287: Forums
288: Forums
289: Forums
290: Forums
291: Your Account
292: Forums
293: Your Account
294: Forums
295: Forums
296: Home
297: Forums
298: Forums
299: Forums
300: Forums
301: Forums
302: Forums
303: Your Account
304: Forums
305: Forums
306: Forums
307: Forums
308: Forums
309: Home
310: Photo Albums
311: Photo Albums
312: Forums
313: Forums
314: Forums
315: Forums
316: Forums
317: Photo Albums
318: Forums
319: Forums
320: Forums
321: Forums
322: Statistics
323: Your Account
324: Home
325: Your Account
326: Forums
327: Forums
328: Forums
329: Home
330: Home
331: Your Account
332: Home
333: Forums
334: Forums
335: Forums
336: Forums
337: Forums
338: Forums
339: Your Account
340: Your Account
341: Forums
342: Forums
343: Forums
344: Your Account
345: Forums
346: Forums
347: Forums
348: Photo Albums
349: Forums
350: Forums
351: Forums
352: Your Account
353: Forums
354: Forums
355: Forums
356: Photo Albums
357: Photo Albums
358: Statistics
359: Forums
360: Photo Albums
361: Forums
362: Forums
363: Forums
364: Forums
365: Forums
366: Forums
367: Forums
368: Your Account
369: Forums
370: Home
371: Forums
372: Forums
373: Forums
374: Forums
375: Home
376: Forums
377: Forums
378: Forums
379: Forums
380: Home
381: Forums
382: Forums
383: Forums
384: Forums
385: Forums
386: Forums
387: Home
388: Forums
389: Your Account
390: Your Account
391: Forums
392: Forums
393: Your Account
394: Forums
395: Photo Albums
396: Forums
397: Forums
398: Your Account
399: Home
400: Home
401: Photo Albums
402: Forums
403: Forums
404: Forums
405: Home
406: Forums
407: Forums
408: Your Account
409: Forums
410: Forums
411: Forums
412: Photo Albums
413: Forums
414: Forums
415: Forums
416: Forums
417: Home
418: Forums
419: Home
420: Forums
421: Forums
422: Forums
423: Forums
424: Forums
425: Home
426: Forums
427: Photo Albums
428: Forums
429: Forums
430: Home
431: Forums
432: Forums
433: Forums
434: Forums
435: Forums
436: Forums
437: Forums
438: Forums
439: Forums
440: Forums
441: Your Account
442: Forums
443: Forums
444: Forums
445: Home
446: Forums
447: Forums
448: Home
449: Forums
450: Photo Albums
451: Forums
452: Photo Albums
453: Your Account
454: Your Account
455: Your Account
456: Forums
457: Your Account
458: Photo Albums
459: Forums
460: Home
461: Forums
462: Forums
463: Forums
464: Forums
465: Your Account
466: Photo Albums
  BOT:
01: Your Account

Staff Online:

No staff members are online!
 

Coppermine Stats
Photo Albums
 Albums: 308
 Pictures: 2451
  · Views: 820725
  · Votes: 1316
  · Comments: 86
 

trimming straight wall cases??
Discussion regarding the reloading of ammunition and tuning of loads for accuracy
Go to page 1, 2  Next
Post new topic   Reply to topic   Printer Friendly Page    Forum Index » Reloading Ammunition

View previous topic :: View next topic  
Author Message
PaulS
Super Member
Super Member


Joined: Feb 18, 2006
Posts: 4330
Location: South-Eastern Washington - the State

PostPosted: Tue Jan 28, 2020 2:12 pm    Post subject: trimming straight wall cases?? Reply with quote

I have found in my shooting that all cases grow in length. My supposition is that as the brass expands to fill the chamber it never fully relaxes back to its prior size. When the brass is resized it flows in the direction of least resistance which is the mouth as the rest of the case is being squeezed by the die.
I have found, since I started reloading 9mm that 53% of the new, once fired, brass trimms in the reloading process and on the second firing it goes up to 73%. (working with the same lot of 200 cases)
I haven't kept track of my 40 caliber or my 357 but I always trim cases in my reloading process. I use the Lyman Universal Trimmer and have it permanently adjusted for 9mm cases at maximum SAAMI length and have spools that are used to set the trimmer for other cases. The spools stop the trimming shaft from going beyond the length they are cut for (I made them myself on my lathe). It is faster to slip the sized cases in the trimmer than it is to check them with my caliper. If the cases trim at all I consider them "needing" to be trimmed. Admittedly sometimes the cases trim on one side of the mouth just squaring it up and other cases trim the entire mouth.Since I do trim them each time they are reloaded I can adjust the case length for the gun(s) the guns that shoot them. The 357 is the only caliber I use in two guns and the case length works for both.

I keep hearing that some people never trim straight wall cases and knowing that the cases grow each time they are fired (even 38 wadcutter loads) I woner how they get away without trimming. Any answers?

_________________
Paul
__________________
Speer, Lyman, Hodgdon, Sierra, and Hornady = reliable loading data
So and So's pages on the internet = NOT reliable loading data
Always check data against manuals
NEVER exceed maximum listed loads
Back to top
View user's profile Send e-mail
dhc4ever
Super Member
Super Member


Joined: May 26, 2011
Posts: 2944
Location: Ipswich, Queensland Australia

PostPosted: Tue Jan 28, 2020 4:18 pm    Post subject: Re: trimming straight wall cases?? Reply with quote

My pistol club used to reload thousands of 9mm rounds over a 2 week cycle, shoots were every 2 weeks.
From memory we didnt trim them, just visually inspected and culled the cracked cases and those badly deformed. Usual club setup, most of the work done by the minimum of willing members, there simply wasnt time.
Almost no feeding, firing or accuracy problems, if you could call shooting a flogged out military Browning hi power accurate.
Still these days I agree with you Paul, trimming is part of the reloading process, although I dont reload for straight walled or pistol calibers these days.
Cheers

_________________
Pete

Dont do anything you wont like explaining to the paramedics..............
Back to top
View user's profile
Vince
Site Admin
Site Admin


Joined: May 25, 2005
Posts: 15704
Location: Brisbane AUSTRALIA

PostPosted: Tue Jan 28, 2020 4:59 pm    Post subject: Re: trimming straight wall cases?? Reply with quote

I learnt about trimming my .357 cases about 2 or 3 years into shooting pistol (I only had a rimfire rifle at that time). I couldn’t believe how much I had to actually trim the cases to bring them back into spec.

I wonder if it was really necessary now because a revolver doesn’t headspace off the case mouth, so a few thousands of an inch in length shouldn’t create a problem. Biggest problem I had was split case mouths caused, I believe, by the application of a roll crimp. I didn’t have any real guidance in reloading so I didn’t know any better, I just used the features of the dies.

These days I only shoot rifle, .223 .243 30.30 and .303 and I check the cases for length after every third reload and trim as necessary. I also as a matter of course anneal the cases after trimming at this time.

_________________
Cheers, Vince Cheers

Illegitimi non carborundum
(Never let the bastards grind you down)

Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God.

"Nulla Si Fa Senza Volonta."
(Without Commitment, Nothing Gets Done)
Back to top
View user's profile AIM Address MSN Messenger Yahoo Messenger Photo Gallery
English Mike
Super Member
Super Member


Joined: Jan 08, 2007
Posts: 1709
Location: Whitehaven, Cumbria, UK

PostPosted: Tue Jan 28, 2020 8:32 pm    Post subject: Re: trimming straight wall cases?? Reply with quote

Some of my .357 mag brass is on it's 10th firing & chambers just fine. Not that it's been used for any really heavy loads though. Same goes for .38spl but seeing as it's all shot in a GP100, it'll have to stretch a ways to get to magnum length. Very Happy
Having said that, I ought to check the brass I'm using in the .45 ACP cylinder in the Blackhawk, as it might be that, rather than needing post-sizing that causes the occasional "sticky" insertion.
Back to top
View user's profile
Pumpkinslinger
Super Member
Super Member


Joined: Sep 22, 2007
Posts: 5001
Location: NC foothills

PostPosted: Tue Jan 28, 2020 9:39 pm    Post subject: Re: trimming straight wall cases?? Reply with quote

If I'm loading plinking loads I don't worry about it too much. I check a few to make sure they aren't way too long. For target or hunting loads I trim to make sure I get a consistent crimp.

_________________
Mike

"I ain't no better than anybody else, and there ain't nobody better than me!" Ma Kettle
Back to top
View user's profile AIM Address Yahoo Messenger Photo Gallery
Gil Martin
Super Member
Super Member


Joined: Jan 28, 2005
Posts: 1837
Location: Schnecksville, PA

PostPosted: Wed Jan 29, 2020 6:17 am    Post subject: Trimming straight wall cases? Reply with quote

It depends what you prefer. My preference is to trim all cases as part of the reloading process and use a Lee case trimmer. It only takes a few minutes to check and trim cases and chamfer and deburr the case mouths. All the best...
Gil

_________________
Gil
Back to top
View user's profile
Bushmaster
Super Member
Super Member


Joined: Jun 12, 2005
Posts: 11390
Location: Ava, Missouri

PostPosted: Wed Jan 29, 2020 10:55 am    Post subject: Re: trimming straight wall cases?? Reply with quote

Revolver cases require trimming because I want the crimp to be even on all cases. Never trimmed 9mm or .380 cases, but I have been known to trim .45 ACP cases. My Colt 1911 Series 80 with a match barrel seems to be more accurate with cases trimmed to .90...

I trim all rifle cases (.30-30, .30-06 and .308).

RCBS Case Trimmer 2

_________________
I have one nerve left and yer standin' on it...

DEMOCRACY Two wolves and one sheep voting on what to have for lunch...
LIBERTY A well armed sheep contesting the outcome of the vote...
Back to top
View user's profile
RePete
Super Member
Super Member


Joined: Aug 15, 2005
Posts: 1034
Location: Gods Country

PostPosted: Wed Jan 29, 2020 4:49 pm    Post subject: Re: trimming straight wall cases?? Reply with quote

I've never trimed pistol cases.

I have 38 Special cases that I've loaded and shot over 35 years. I have only discarded cracked cases.

_________________
Proud member of the WTFDTSG Club.

Stercus Accidit = Sh*t Happens in Latin.

Nice try = You Suck spelled different.

My parents spanked me as a child. As a result, I now suffer from a psychological condition known as RESPECT FOR OTHERS.
Back to top
View user's profile
Vince
Site Admin
Site Admin


Joined: May 25, 2005
Posts: 15704
Location: Brisbane AUSTRALIA

PostPosted: Wed Jan 29, 2020 5:11 pm    Post subject: Re: trimming straight wall cases?? Reply with quote

Same here RePete...I have .357 revolver cases that are 40 years old and still in good useable condition. Those cases were only ever used for target shooting, and as there was no minimum power factor other than the need to penetrate a piece of Masonite (about 3mm thick) at 50 metres, they only ever suffered a loading of 2.8 - 3.5gr of Bullseye. The only problem I ever had with them was cracked case mouths cause by work hardening from roll crimping.

_________________
Cheers, Vince Cheers

Illegitimi non carborundum
(Never let the bastards grind you down)

Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God.

"Nulla Si Fa Senza Volonta."
(Without Commitment, Nothing Gets Done)
Back to top
View user's profile AIM Address MSN Messenger Yahoo Messenger Photo Gallery
English Mike
Super Member
Super Member


Joined: Jan 08, 2007
Posts: 1709
Location: Whitehaven, Cumbria, UK

PostPosted: Wed Jan 29, 2020 7:32 pm    Post subject: Re: trimming straight wall cases?? Reply with quote

Vince wrote:
Same here RePete...I have .357 revolver cases that are 40 years old and still in good useable condition. Those cases were only ever used for target shooting, and as there was no minimum power factor other than the need to penetrate a piece of Masonite (about 3mm thick) at 50 metres, they only ever suffered a loading of 2.8 - 3.5gr of Bullseye. The only problem I ever had with them was cracked case mouths cause by work hardening from roll crimping.

I was having occasional examples of necks cracking (not a big problem with .357, as I just trimmed 'em to .38spl length...), so I invested in one o' those rotary motorised annealers & run cases every 4th reload. Haven't had a neck crack since.
OK, so I've 2,700 .38spl cases & about half that in .357 mag(ain't brass ratting great)... Very Happy
Back to top
View user's profile
Bushmaster
Super Member
Super Member


Joined: Jun 12, 2005
Posts: 11390
Location: Ava, Missouri

PostPosted: Wed Jan 29, 2020 8:32 pm    Post subject: Re: trimming straight wall cases?? Reply with quote

Now that's great. I am always glad to run across another "Brass Rat".

I've been known to have people trip over me at the range as I , on my hands and knees, collect brass.

_________________
I have one nerve left and yer standin' on it...

DEMOCRACY Two wolves and one sheep voting on what to have for lunch...
LIBERTY A well armed sheep contesting the outcome of the vote...
Back to top
View user's profile
PaulS
Super Member
Super Member


Joined: Feb 18, 2006
Posts: 4330
Location: South-Eastern Washington - the State

PostPosted: Wed Jan 29, 2020 11:19 pm    Post subject: Re: trimming straight wall cases?? Reply with quote

I use range brass too but it is rare to find any revolver cases. Most of my 9mm is now range brass and about half of my 40. Back when I was trying to get over a flinch with my 357 I was shooting light wad cutter loads with it but the cases still grew. It might be the difference in the chamber size that adds to the problem. My 03A3 has a chamber that is big enough around to handle bullets from machine guns. The chamber lenth is OK but when I tried full length sizing that brass I was trimming with every reload and at about the third or fourth load the body of the case would split vertically. Since I started neck sizing only I haven't had any splits.
Like I said, my cases are trimmed at the maximum case length or close to it so especially with the semi autos it becomes necessary to do.
I'm also with Bushy on the equal crimp rule with all the cases I crimp. It doesn't matter whether it is a taper or roll crimp, if they aren't the same results will show it. I do shoot my handguns a bit farther than most but I got used to shooting at 100 yards when I was shooting silhouette and it stuck. Accuracy is real important at 100 yards with a pistol.

_________________
Paul
__________________
Speer, Lyman, Hodgdon, Sierra, and Hornady = reliable loading data
So and So's pages on the internet = NOT reliable loading data
Always check data against manuals
NEVER exceed maximum listed loads
Back to top
View user's profile Send e-mail
RePete
Super Member
Super Member


Joined: Aug 15, 2005
Posts: 1034
Location: Gods Country

PostPosted: Thu Jan 30, 2020 6:45 am    Post subject: Re: trimming straight wall cases?? Reply with quote

The O3A3's had oversized chambers for easy extraction with no regard for reloading.

_________________
Proud member of the WTFDTSG Club.

Stercus Accidit = Sh*t Happens in Latin.

Nice try = You Suck spelled different.

My parents spanked me as a child. As a result, I now suffer from a psychological condition known as RESPECT FOR OTHERS.
Back to top
View user's profile
English Mike
Super Member
Super Member


Joined: Jan 08, 2007
Posts: 1709
Location: Whitehaven, Cumbria, UK

PostPosted: Thu Jan 30, 2020 3:53 pm    Post subject: Re: trimming straight wall cases?? Reply with quote

Bushmaster wrote:
Now that's great. I am always glad to run across another "Brass Rat".

I've been known to have people trip over me at the range as I , on my hands and knees, collect brass.

Me & my mate in Albuquerque have been known to head out to the club for a late afternoon shooting session mostly with gleaning brass in mind.
One kind person once threw 4x50 boxes of factory .38spl brass in the trash can, having put all the cases back in the boxes first.
We had a count up (or rather a weigh & guesstimate) when I was over in November & we worked out we have 14,000 .45 ACP cases, with half of them sized & steel pin tumbled & about 8,000 rounds loaded with 200gr LSWC.
There's a couple of sacks full of once fired 5.56 brass waiting it's turn - mebbe 200lbs, which we reckon is about 8,000 cases...

All loading's done using an RCBS Junior (heck, I do better here in the UK as I have a Rockchucker). Very Happy
Back to top
View user's profile
PaulS
Super Member
Super Member


Joined: Feb 18, 2006
Posts: 4330
Location: South-Eastern Washington - the State

PostPosted: Fri Jan 31, 2020 12:25 am    Post subject: Re: trimming straight wall cases?? Reply with quote

Mike do you use a cement mixer to clean all that brass with steel pins?
Doing it a batch at a time in a Frankfort Arsenal tumbler would take weeks.

_________________
Paul
__________________
Speer, Lyman, Hodgdon, Sierra, and Hornady = reliable loading data
So and So's pages on the internet = NOT reliable loading data
Always check data against manuals
NEVER exceed maximum listed loads
Back to top
View user's profile Send e-mail
Display posts from previous:   
Post new topic   Reply to topic   Printer Friendly Page    Forum Index » Reloading Ammunition
Page 1 of 2
All times are GMT - 7 Hours
Go to page 1, 2  Next



Jump to:  


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum


Valid CSS! Valid HTML 4.01!
Click to check if this page is realy HTML 4.01 compliant for speed :)

All logos and trademarks in this site are property of HuntingNut.com.
The comments are property of their posters, all the rest © 2011 by HuntingNut.com
Interactive software released under GNU GPL, Code Credits, Privacy Policy

.: Upgraded to DragonFly 9.2 by *Dizfunkshunal* :.