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tlo7mm Super Member
Joined: Nov 15, 2010 Posts: 426 Location: Oregon
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Posted: Wed Dec 22, 2010 12:48 pm Post subject: Gun vs reload |
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So I am new to reloading and only have my amature Bro to teach me most of the stuff dealing with reloading. What I am curious about is wether or not I have to sight in my gun everytime I change bullit weight or is that basically a myth? I am loading some test rounds in 145gr speer for my big 7 but it is not my choice of round that I intend to run in my gun plus I run a heavier bullet for elk hunting then I do for deer hunting. Should I sight in my gun everytime I change bullet weights or should I just look into getting another rifle?
_________________ "If someone has a gun and is trying to kill you, it would be reasonable to shoot back with your own gun." ~ The Dalai Lama
Never ascribe to malice that which is adequately explained by incompetence. - Napoleon Bonaparte
The wisdom of man never yet contrived a system of taxation that would operate with perfect equality. - Andrew Jackson
Patriotism is supporting your country all the time, and your government when it deserves it. - Mark Twain |
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Aloysius Super Member
Joined: Nov 03, 2009 Posts: 2438 Location: B., Belgium
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Posted: Wed Dec 22, 2010 2:03 pm Post subject: Re: Gun vs reload |
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Do you sight your gun every time you change distance?
When you're not shooting the .375 H&H, you'll call yourself very lucky when you change bulletweight and get the same POI. As to my knowledge, only the .375 H&H is known for its relative stable POI (but I guess the targets for this calibers allow a mistake of a few inches)
In my opinion the best you do is looking for the smallest groupe for each bullet and then you don't change optics but keep into account the different shootingdiagrams when you change bullets, just the same as when you go for another distance.
When you have 2 (or more) aiming devices (f.e. optics you can change without need for adjustment), you can also couple the aiming device to a certain bullet. It would make life a little easier, but still you have to keep in mind the different hold over/under with different distances and left/right according windconditions.
Advice: when you change a lot, keep notes!
Or you soon will loose confidence in your rifle, round or yourself.
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roklok Super Member
Joined: Aug 11, 2005 Posts: 608 Location: Fairbanks, Alaska
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Posted: Wed Dec 22, 2010 3:58 pm Post subject: Re: Gun vs reload |
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Yes, definitely zero the rifle with whatever load you are using. My .270 shoots my 150 grain Speer Grand Slam bear and moose loads about 5 MOA to the left of my 130 grain SST deer and sheep loads. It is impossible to predict the change in POI when changing loads, best just to check and if needed, re-zero.
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Pumpkinslinger Super Member
Joined: Sep 22, 2007 Posts: 5001 Location: NC foothills
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Posted: Wed Dec 22, 2010 4:17 pm Post subject: Re: Gun vs reload |
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Yep, rezero if you change ammo. In my .280 I tried 139 grain and 160 grain bullets and there was about 3" difference in the point of impact at 100 yards.
_________________ Mike
"I ain't no better than anybody else, and there ain't nobody better than me!" Ma Kettle |
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English Mike Super Member
Joined: Jan 08, 2007 Posts: 1709 Location: Whitehaven, Cumbria, UK
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Posted: Wed Dec 22, 2010 5:14 pm Post subject: Re: Gun vs reload |
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I have a range card for the .270 that has the different bullets & bullet weights I use on it.
The rifle's zeroed for Sierra 130gr flat base & all the others are marked as +/- so many MOA from that setting.
Only checked it out at 100 & 200yds as yet, so further "work" will have to be done out to 400 with boat-tail bullets.
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1895ss Super Member
Joined: Jul 21, 2005 Posts: 2612 Location: Not Here...!!
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Posted: Wed Dec 22, 2010 5:59 pm Post subject: Re: Gun vs reload |
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What these fellows said ... ???
_________________ A cruel truth is much more desirable than a really nice lie.
'Tis far better to walk alone than to follow a crowd or an a**hole going the wrong way.
Last edited by 1895ss on Fri Dec 24, 2010 12:51 pm; edited 1 time in total |
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chambered221 Super Member
Joined: Aug 17, 2007 Posts: 3455 Location: Lost for good !!!
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Posted: Wed Dec 22, 2010 7:48 pm Post subject: Re: Gun vs reload |
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If your going to use different bullet weights in the same gun it pays to have a good scope with positive click adjustments with a micrometer style reading. Once you get everything figured out you can record the settings and easily return to them for each weight. You could even have multiple settings for different yardages.
_________________ Ask as many people needed, sooner or later your question will be answered the way you want it answered !!!
A free people ought not only to be armed and disciplined, but they should have sufficient arms and ammunition to maintain a status of independence from any who might attempt to abuse them, which would include their own government.
~George Washington |
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Elvis Super Member
Joined: Jul 27, 2008 Posts: 9239 Location: south island New Zealand
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Posted: Wed Dec 22, 2010 10:05 pm Post subject: Re: Gun vs reload |
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my 270 puts 170grn loads dead on at 100yrds and 130s 3"high I can put plurry near ANY load through it and will put them within 4" of aim point at 100yrds eg all inside a playing card.
_________________ You shot it You pluck it !
Them who eats the most duck eats the most feathers! |
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Dawgdad Super Member
Joined: Feb 08, 2006 Posts: 1065 Location: On the Prairie
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Posted: Thu Dec 23, 2010 7:20 am Post subject: Re: Gun vs reload |
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chambered221 wrote: |
If your going to use different bullet weights in the same gun it pays to have a good scope with positive click adjustments with a micrometer style reading. Once you get everything figured out you can record the settings and easily return to them for each weight. You could even have multiple settings for different yardages. |
I use 110, 125 150 and 168gr loads in my 30-06 - I have a notebook that tells me where to set the elevation using a Stoney Point target knob for the proper zero for each load. There is about a 4 moa difference among the loads. I still shoot a couple of rounds to be sure before hitting the game fields.
_________________ Alcohol, Tobacco and Firearms should be a convenience store, not a government agency... |
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wncchester Member
Joined: Apr 08, 2006 Posts: 160
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Posted: Thu Dec 23, 2010 12:09 pm Post subject: Re: Gun vs reload |
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Nothing is ALWAYS true in shooting but having different loads hit to the same point of impact is unusual.
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Elvis Super Member
Joined: Jul 27, 2008 Posts: 9239 Location: south island New Zealand
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Posted: Fri Dec 24, 2010 1:51 am Post subject: Re: Gun vs reload |
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wncchester wrote: |
Nothing is ALWAYS true in shooting but having different loads hit to the same point of impact is unusual. |
well thats often true but Ive got 2 rifles that do.
my zastava .223 hasnt had scope moved at all 12 years of use LOTS of rounds and animals tipped over it groups nearenuf for this kiwi lad. within that playing card size too. Of course my .270win does this its a post 64 (mid 80s) mod 70 lightweight made by that great firm Winchester . some fellas like to get the last possible bit of accuracy from gun/load combos. Im lazy and dont have any problems tipping animals over under 300yrds with my loads and if I get a long shot Ive got time to get out a super duper accurate load fron my waistbag.
_________________ You shot it You pluck it !
Them who eats the most duck eats the most feathers! |
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Vince Site Admin
Joined: May 25, 2005 Posts: 15704 Location: Brisbane AUSTRALIA
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Posted: Fri Dec 24, 2010 3:15 am Post subject: Re: Gun vs reload |
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7mm...the first thing I would be concerned with is choosing a projectile and weight and developing a load for that projectile and weight. The most important thing is group size before you worry about zeroing. Don't worry about where it is hitting on the target (so long as it is on the paper that is), just develop the load to the point you are happy with the group size. Once you have done that you can then look at zeroing the load to your chosen point of impact (POI).
No doubt you will have two, or maybe three different weight projectiles and loads for your rifle and this is where a quality scope that has turrets that can be zeroed, and good record keeping, comes into its own. After your have worked up your first load and zeroed your rifle/scope combination to it, zero the knobs on your scope. As you develop each load and get your rifle zeroed to it, keep a record of the number of clicks up or down from "zero" for each load. Remember to return your scope to "zero" after each load development. It then becomes a fairly simple matter to adjust your scope to the "zero" for a given load...a quick confirmatory few shots, then your are ready to go.
I know this sounds simple, but it is a fair bit of work, but as English Mike says...a simple chart of sight adjustments should put you on the money in short order with each bullet/load change.
Cheers, Vince
_________________ Cheers, Vince
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) |
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tlo7mm Super Member
Joined: Nov 15, 2010 Posts: 426 Location: Oregon
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Posted: Sun Dec 26, 2010 5:17 pm Post subject: Re: Gun vs reload |
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Thanks for the info, I appriciate it.
_________________ "If someone has a gun and is trying to kill you, it would be reasonable to shoot back with your own gun." ~ The Dalai Lama
Never ascribe to malice that which is adequately explained by incompetence. - Napoleon Bonaparte
The wisdom of man never yet contrived a system of taxation that would operate with perfect equality. - Andrew Jackson
Patriotism is supporting your country all the time, and your government when it deserves it. - Mark Twain |
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BigBlue Super Member
Joined: Jan 16, 2006 Posts: 1108 Location: Lehigh Township, Pennsylvania
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Posted: Tue Dec 28, 2010 6:47 am Post subject: Re: Gun vs reload |
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I have two loads that I use in my 30-06. One is a 220gr. RN bullet that I have set with the scope set to zero at 100 yards. The second load uses 168gr Barnes TSX bullets and it shoots 3" high at 100 yards.
Don
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Long Member
Joined: Dec 27, 2010 Posts: 37
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