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My accuracy jump with simple primer change

 
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  #8  
Old 09-08-2012, 09:43 AM
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Re: My accuracy jump with simple primer change

A)
Quote:
Originally Posted by Lefty7mmstw View Post
t-3 have you worked with rl 19 in your 338? My 338 loves it. Both 225's and 250's.
B)
Quote:
Originally Posted by diderr View Post
What powder do you use? What I've read is the br-2's work better with slower powder. I use 65 grns of H4831sc and it ignites really well. It's not as much flame as a 9 1/2 m or a 215 of course , but as long as it lights well.

Details: Goal in Dec 2008 after Bull of a life time got up 4:37pm and walked off from 50 yds below me - cause I did not shoot a dead bull {NOT} between the shoulder blades before I went around the mt top to call for horse help for next morning-thank GOD my 15yr old cell would not lock on to town 35 mi. away even though I could see town and hear it dialing (don't get me started-LOL)-REPLACE .270 mod 70 _3,100fps+ (after 45 yrs._140 Black Talons last 15yrs.) with CANNON - 6.6lb Tika T-3 SS lite-no brake-338WM 225gr MRX @ 3,000fps on H4350 and GM 215M in WW brass-cleaning after each shot so all shots are 'clean cold'!! Never got Nellie to do her part on the 'clean cold' part....grouped fine....put a new Victory Davari on Dec 2010 and when I was Zeroing it in found out she liked the store bought Horney 185 gr GMX Superformance in dirty mode(>15 rounds). right now I'm ELK hunting dirty with the 3,080fps 185gr GMXs to 800yds. I would still like to get back on my original plan which is same as Broz does...clean to the shine and nail it when 'clean & cold'. When you get to a clean bore you can dupe that every time...I can't be sure I can dupe a perfect shot if it comes some where between 15 and 40 dirty shots. I just ain't that good!

A) I bought a bunch of powder flavors when I started in Dec 2008 that might work in my gun and since I ELK hunt at 10,000' in -5F > 60F I needed most stable non temp-sensitive powder and H4350 is what I concluded would meet that reqirement. I do have all the RLs that might work and a bunch of other sample cans but purchased all the components for duping the GMX 185 since I have 5 boxes of fireformed Horney brass now. I know my Superformance powder is not the same as Factory rounds.....IT WILL BE CLOSE ENOUGH THOU! What I don't have is the Horney primer and thought I would try your trick (BR-2) on my one MRX 225gr load and when I develop the GMX 185 load. I will get back to it next year IF~N I live long enough. It's a 3 hour trip to go shoot and BARRY O ain't put nothing in my SS check since he got here, so I don't have to ever do it. Those GMX 185s don't kick any more than my old .270 did with it's plastic butt pad!!!!

B) I have the H4831 & H4831sc and hope to test in JAN to try and get bullseye with my 'clean & cold' then I can dupe it every time. Please send me some info. if you learn anything that might help me and my one shot desire....not grouping. Thanks again.
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  #9  
Old 09-09-2012, 08:13 AM
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Re: My accuracy jump with simple primer change

heres what ive found with primers. Yes they can make a big differnce in accuracy. Ive seen groups cut in half by changing primers. Is one any better then another. NOPE and ill even include various match primers in that statement. Ive seen better accuracy by changing primers but bump that powder charge up or down a grain or switch to a differnt bullet and everything changes again and your original primer might be the one that shines.
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  #10  
Old 09-09-2012, 07:46 PM
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Re: My accuracy jump with simple primer change

THis what the load on the left did today at 400 yards with a VERY heavy mirage off a bipod and a rear bag. 1.371" or 0.327 MOA
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  #11  
Old 09-09-2012, 09:15 PM
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Re: My accuracy jump with simple primer change

Critters be scared.....be very very skeeeerrrrredd.

Close enough for Gov work....ie Wolfs control.
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Son, The first shot is the important one - the others just make him run faster! Grandpa 1949
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  #12  
Old 09-10-2012, 05:31 AM
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Re: My accuracy jump with simple primer change

Quote:
Originally Posted by diderr View Post
THis what the load on the left did today at 400 yards with a VERY heavy mirage off a bipod and a rear bag. 1.371" or 0.327 MOA
thats as shootin sob!!
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  #13  
Old 09-10-2012, 10:15 PM
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Re: My accuracy jump with simple primer change

I want to try it again on a different day to see if I can get it even better without a mirage.
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