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: 115
BOT: 1
Total: 116
Who Is Where:
 Visitors:
01: Your Account
02: Forums
03: Forums
04: Forums
05: Forums
06: Forums
07: Forums
08: Home
09: Home
10: Home
11: Forums
12: Forums
13: Photo Albums
14: Forums
15: Home
16: Forums
17: Forums
18: Forums
19: Forums
20: Forums
21: Forums
22: Forums
23: Forums
24: Forums
25: Forums
26: Forums
27: Your Account
28: Forums
29: Forums
30: Forums
31: Forums
32: Home
33: Your Account
34: Forums
35: Forums
36: Forums
37: Forums
38: Forums
39: Forums
40: Forums
41: Home
42: Forums
43: Forums
44: Photo Albums
45: Home
46: Home
47: Home
48: Forums
49: Your Account
50: Forums
51: Forums
52: Forums
53: Home
54: Forums
55: Home
56: Home
57: Home
58: Forums
59: Home
60: Forums
61: Forums
62: Forums
63: Forums
64: Forums
65: Home
66: Forums
67: Forums
68: Photo Albums
69: Forums
70: Your Account
71: Photo Albums
72: Forums
73: Forums
74: Home
75: Forums
76: Home
77: Forums
78: Forums
79: Home
80: Forums
81: Forums
82: Forums
83: Home
84: Forums
85: Forums
86: Home
87: Forums
88: Forums
89: Photo Albums
90: Forums
91: Forums
92: Your Account
93: Forums
94: Home
95: Photo Albums
96: Forums
97: Forums
98: Forums
99: Forums
100: Your Account
101: Forums
102: Forums
103: Forums
104: Home
105: Forums
106: Forums
107: Forums
108: Forums
109: Forums
110: Home
111: Home
112: Forums
113: Forums
114: Forums
115: Home
  BOT:
01: Forums

Staff Online:

No staff members are online!
 

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

IMR 8208XBR
Discussion regarding the reloading of ammunition and tuning of loads for accuracy
Go to page Previous  1, 2
Post new topic   Reply to topic   Printer Friendly Page    Forum Index » Reloading Ammunition

View previous topic :: View next topic  
Author Message
44marty
Super Member
Super Member


Joined: Mar 20, 2009
Posts: 775
Location: Cheshire, MA; USA

PostPosted: Mon May 24, 2010 9:20 am    Post subject: Re: IMR 8208XBR Reply with quote

Another interesting target.
After the OCW test for IMR8208 powder, I shot a 25 round group with a mix of my three go-to loads. I moved 3/8 MOA up and right, then let fly. These were 39gr Blitz Kings loaded with my OCW charges of IMR4064(3rounds), IMR4895(5rds), and IMR3031(17rds). I feel good that I can pick up any of these and demolish a varmint at any range I'm likely to shoot.
The 7 rounds inside the black outline were "foulers" shot earlier.
[img]
i840.photobucket.com/a....jpg[/img]

_________________
_____________________________________

The strength of the wolf is in the pack; the strength of the pack is in the wolf. ~ R. Kipling

I LOVE YOU, LADY LUCK !!!
Back to top
View user's profile Photo Gallery
44marty
Super Member
Super Member


Joined: Mar 20, 2009
Posts: 775
Location: Cheshire, MA; USA

PostPosted: Mon May 24, 2010 9:21 am    Post subject: Re: IMR 8208XBR Reply with quote



Hope it worked that time . . .

I must be a REALLY OLD dog.

_________________
_____________________________________

The strength of the wolf is in the pack; the strength of the pack is in the wolf. ~ R. Kipling

I LOVE YOU, LADY LUCK !!!
Back to top
View user's profile Photo Gallery
slimjim
Super Member
Super Member


Joined: May 16, 2009
Posts: 8314
Location: Fort Worth TX

PostPosted: Mon May 24, 2010 4:53 pm    Post subject: Re: IMR 8208XBR Reply with quote

Ok, after all the pictures of the groups, I think I need to see a picture of this rifle! What was the time interval on your shots?

_________________
"To anger a conservative, lie to him. To anger a liberal, tell him the truth." - Theodore Roosevelt

"The world is a dangerous place to live; not because of the people who are evil, but because of the people who don't do anything about it." - Albert Einstein
Back to top
View user's profile Photo Gallery
44marty
Super Member
Super Member


Joined: Mar 20, 2009
Posts: 775
Location: Cheshire, MA; USA

PostPosted: Mon May 24, 2010 8:10 pm    Post subject: Re: IMR 8208XBR Reply with quote

I'll have to take a picture for you, Slimjim. It's an off-the-shelf Ruger 77 Mark II stainless steel varmint rifle, standard bull barrel and laminated benchrest style stock. Lots of clearance between the stock and free floating barrel.
Barrel heating doesn't seem to be an issue - groups don't really grow much. The 25 round group in the previous photo was shot with very little cooling.

8208 OCW results from today:
26.0 gr powder was both the OCW choice and the tightest 3-round group, at 5/16" center-to-center (125 yds). The one round that registered was 3697 fps

The clouds rolled in again just after I started shooting, but I did get some chrono results:
25.8 gr - - - - - - - - - 3675 fps, 3686 fps
26.0 gr - - - - - - - - - 3697 fps
26.4 gr - - - - - - - - - 3808 fps

No rounds registered for the 25.6 gr or 26.2 gr loads.

The primer cratering issue did not appear with charges 26.0 gr or less. At 26.2 gr it was apparent, but minimal. The 26.4 gr (and higher rounds in the earlier post) all showed cratering as in the photo.
This surprises me with the 8208. Pushing the same bullet faster with IMR 3031, 4895, and 4064 doesn't show the same degree of primer deformation.

Again, bullets were 39 gr Sierra blitz king, neck-sized Win brass, and
Rem 7 1/2 BR primers.

_________________
_____________________________________

The strength of the wolf is in the pack; the strength of the pack is in the wolf. ~ R. Kipling

I LOVE YOU, LADY LUCK !!!
Back to top
View user's profile Photo Gallery
slimjim
Super Member
Super Member


Joined: May 16, 2009
Posts: 8314
Location: Fort Worth TX

PostPosted: Tue May 25, 2010 4:42 am    Post subject: Re: IMR 8208XBR Reply with quote

I'm jealous! It typically takes me two months to accomplish what you've done in a couple of days. Very predictable accuracy. Some day I'll have a rifle like that. Great shooting with a great (unseen) rifle!
Back to top
View user's profile Photo Gallery
44marty
Super Member
Super Member


Joined: Mar 20, 2009
Posts: 775
Location: Cheshire, MA; USA

PostPosted: Tue May 25, 2010 3:11 pm    Post subject: Re: IMR 8208XBR Reply with quote

slimjim wrote:
Ok, after all the pictures of the groups, I think I need to see a picture of this rifle! What was the time interval on your shots?

The 25-round group was fired last thing before leaving. Timing: five shot strings at 20 to 30 second intervals with about 1 to 2 minutes between the five strings. I wanted to see how much the group would grow with barrel heating. NOT MUCH !!!

During the OCW testing, I would feel the barrel and wait to shoot until it was only slightly warm. (Tried to wait 1 to 2 minutes between rounds, but cheated some.) I cleaned the barrel after each 10 rounds and fired a fouler before continuing.

I'll post photos in a minute - - have to grab them off my camera . . . .

_________________
_____________________________________

The strength of the wolf is in the pack; the strength of the pack is in the wolf. ~ R. Kipling

I LOVE YOU, LADY LUCK !!!
Back to top
View user's profile Photo Gallery
44marty
Super Member
Super Member


Joined: Mar 20, 2009
Posts: 775
Location: Cheshire, MA; USA

PostPosted: Tue May 25, 2010 3:20 pm    Post subject: Re: IMR 8208XBR Reply with quote

The scope is a Barska 10X - 40X 50mm

The rifle is stock off-the-shelf






_________________
_____________________________________

The strength of the wolf is in the pack; the strength of the pack is in the wolf. ~ R. Kipling

I LOVE YOU, LADY LUCK !!!
Back to top
View user's profile Photo Gallery
44marty
Super Member
Super Member


Joined: Mar 20, 2009
Posts: 775
Location: Cheshire, MA; USA

PostPosted: Tue May 25, 2010 3:21 pm    Post subject: Re: IMR 8208XBR Reply with quote

Cool . . . You really CAN teach an old dog new tricks!

_________________
_____________________________________

The strength of the wolf is in the pack; the strength of the pack is in the wolf. ~ R. Kipling

I LOVE YOU, LADY LUCK !!!
Back to top
View user's profile Photo Gallery
44marty
Super Member
Super Member


Joined: Mar 20, 2009
Posts: 775
Location: Cheshire, MA; USA

PostPosted: Tue May 25, 2010 3:26 pm    Post subject: Re: IMR 8208XBR Reply with quote

PS - That beanbag is what I am using as a rest. I set up the gun at the bench as shown here in the photos.

_________________
_____________________________________

The strength of the wolf is in the pack; the strength of the pack is in the wolf. ~ R. Kipling

I LOVE YOU, LADY LUCK !!!
Back to top
View user's profile Photo Gallery
slimjim
Super Member
Super Member


Joined: May 16, 2009
Posts: 8314
Location: Fort Worth TX

PostPosted: Wed May 26, 2010 2:17 am    Post subject: Re: IMR 8208XBR Reply with quote

44, that is one beautiful rifle!! I love the laminated wood stocks! Thanks for taking the time to take and post the pictures.

_________________
"To anger a conservative, lie to him. To anger a liberal, tell him the truth." - Theodore Roosevelt

"The world is a dangerous place to live; not because of the people who are evil, but because of the people who don't do anything about it." - Albert Einstein
Back to top
View user's profile Photo Gallery
44marty
Super Member
Super Member


Joined: Mar 20, 2009
Posts: 775
Location: Cheshire, MA; USA

PostPosted: Wed May 26, 2010 7:47 am    Post subject: Re: IMR 8208XBR Reply with quote

Yeah, I love this rifle. Can you believe that someone bought this rifle and then sold it to Datillio's gun shop (S. Burlington, VT) after firing only 16 rounds? He saved me a few hundred bucks.

Next up - comparing Frozen with normal ammo in IMR 4895 and IMR 3031.

Then, accuracy comparison between OCW loads of IMR 3031, 4895, and 8208.

And then, finally, more testing with my 300 WBY mag. Looking forward to some real recoil. I don't care for the barrel cooling time, though. I really get spoiled shooting the 204.

_________________
_____________________________________

The strength of the wolf is in the pack; the strength of the pack is in the wolf. ~ R. Kipling

I LOVE YOU, LADY LUCK !!!
Back to top
View user's profile Photo Gallery
Grumulkin
Super Member
Super Member


Joined: Apr 16, 2007
Posts: 365
Location: Central Ohio

PostPosted: Wed May 26, 2010 2:50 pm    Post subject: Re: IMR 8208XBR Reply with quote

I've got to shoot some more with IMR 8208XBR and even got velocity data! The pressure is not high; I could push the load further but am leaving it as is because accuracy is best there. This 3 shot group was shot at 200 yards.

I've found this powder to be very clean burning and it meters very well. In fact, though I usually weigh all powder charges individually, after getting a couple dozen charges that were right on fresh from the powder measure, I started just throwing charges which makes reloading with this powder quite a bit faster than with most of the others I use.

Using the Point Blank software with a knowledge of the ballistic coefficient of the bullet and drop data, I calculated the velocity to be about 2,900 fps. That turned out to be close; measured velocity over an average of 11 shots came out to 2,850 fps.

It was a gut wrenching decision but I decided the target has been patched enough and am going to discard it.
Back to top
View user's profile Visit poster's website
shrpshtrjoe
Super Red Neck Member
Super Red Neck Member


Joined: Jan 26, 2005
Posts: 2965
Location: Maryland

PostPosted: Wed May 26, 2010 3:23 pm    Post subject: Re: IMR 8208XBR Reply with quote

I might have to try this powder for the .223

_________________
"MOLON LABE"

P E T A
People Eating Tasty Animals
Back to top
View user's profile Photo Gallery
44marty
Super Member
Super Member


Joined: Mar 20, 2009
Posts: 775
Location: Cheshire, MA; USA

PostPosted: Wed May 26, 2010 5:04 pm    Post subject: Re: IMR 8208XBR Reply with quote

Well, that's a sweet 200 yd group, grumulkin. Yes, the 8208 meters like a dream.

Follow-up comparison to the 8208 "Frozen ammo" test this afternoon is too small a sample, but the results are just about what I expected.

IMR 3031 FROZEN at -10 F
3872 fps
3868 fps

IMR 3031 at 70 F
3888
3864

IMR 4895 FROZEN at -10 F
3765
3746

IMR 4895 at 70 F
3812
3832

Both the 3031 and 4895 (from the same batch of reloads) have averaged right around 40 fps faster than today's 70 F results. Today I was shooting offhand, possibly at an angle to the chrono.

Not that it matters for the comparison, but:
neck-sized Nosler brass, CCI 450 primers, 39 gr Sierra blitz king bullets, .204 Ruger M 77 Mark II

_________________
_____________________________________

The strength of the wolf is in the pack; the strength of the pack is in the wolf. ~ R. Kipling

I LOVE YOU, LADY LUCK !!!
Back to top
View user's profile Photo Gallery
slimjim
Super Member
Super Member


Joined: May 16, 2009
Posts: 8314
Location: Fort Worth TX

PostPosted: Wed May 26, 2010 6:20 pm    Post subject: Re: IMR 8208XBR Reply with quote

Grumulkin wrote:
It was a gut wrenching decision but I decided the target has been patched enough and am going to discard it.

At least you have the photographic record!
Back to top
View user's profile Photo Gallery
Display posts from previous:   
Post new topic   Reply to topic   Printer Friendly Page    Forum Index » Reloading Ammunition
Page 2 of 2
All times are GMT - 7 Hours
Go to page Previous  1, 2



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* :.