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Long Range Hunting & Shooting
Why do some rifles shoot better dirty?
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<blockquote data-quote="J E Custom" data-source="post: 237351" data-attributes="member: 2736"><p>As I have said on other post I am very particular with my loading process and some of the things that I do may not be nessary but I try to leave no stone unturned so that I don't</p><p>have to wonder if I missed anything.</p><p></p><p>So hear is the way I work up my loads.</p><p></p><p>First I do a full prep on my brass. Polish,Size,Trim,Deburr case mouth,Deburr primer pocket</p><p>and weight sort brass to .05 grain lots.</p><p></p><p>Then look at case capacity to determine the primer to start with. 50grains or less I will</p><p>use a standard primer(Non Magnum),50 to 100grains calls for a Magnum primer like the</p><p>rem 9 1/2 M ,And over 100graines of powder I will start with the hotter Fed 215.</p><p></p><p>Next I will deside the bullet type and weight I want to use based on it's intended</p><p>use and barrel twist.</p><p></p><p>Then comes the powder. I look for a powder that will reach max pressure and velocity</p><p>at 100% case density.</p><p></p><p>I start 3 or 4grains below the max and work up .03 grains at a time.</p><p></p><p>Load 4 or 5 rounds of each and go to the range.</p><p></p><p>I believe in using the chronograph for load development because the first thing I want to</p><p>find is a load with a very low standard deviation(0 to 15).This tells me that I have a good </p><p>powder,primer,bullet weight combination.</p><p></p><p>If a load starts out with poor S D's (first 2 or 3 rounds) I abandon it and save the rest of</p><p>that batch for fouling rounds</p><p></p><p>Once I have low S D's then I play with primers and bullet seating depths to get the best</p><p>groups at 200 or 300yrds.</p><p></p><p>While fine tuning your load only change one component at a time.</p><p></p><p>That is why I clean,shoot 1 fouling shot,dry patch to remove carbon,and shoot 3 or 4</p><p>for S D's drypatching only between each shot.</p><p></p><p>Before I start testing the next load I do a good solvent clean and start the process</p><p>over.</p><p></p><p>Note!! even though you get good S D's your groups may not be good because of bullet</p><p>quality or seating depth ,So I will try other bullet brands of the same weight after I try</p><p>different seating depths.</p><p></p><p>Using this method I have managed to get all of my rifles under 3/8ths MOA and 4 under</p><p>1/10 MOA (30/378 .092 ,7 WSM .077 , 7-08 .054 and a 416 buff to .034 ).</p><p></p><p>Some of the other guys have other ways of getting good accuracy and maby they will</p><p>chime in and help with some other ways to get the most out of your rifle/pistol loads.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 237351, member: 2736"] As I have said on other post I am very particular with my loading process and some of the things that I do may not be nessary but I try to leave no stone unturned so that I don't have to wonder if I missed anything. So hear is the way I work up my loads. First I do a full prep on my brass. Polish,Size,Trim,Deburr case mouth,Deburr primer pocket and weight sort brass to .05 grain lots. Then look at case capacity to determine the primer to start with. 50grains or less I will use a standard primer(Non Magnum),50 to 100grains calls for a Magnum primer like the rem 9 1/2 M ,And over 100graines of powder I will start with the hotter Fed 215. Next I will deside the bullet type and weight I want to use based on it's intended use and barrel twist. Then comes the powder. I look for a powder that will reach max pressure and velocity at 100% case density. I start 3 or 4grains below the max and work up .03 grains at a time. Load 4 or 5 rounds of each and go to the range. I believe in using the chronograph for load development because the first thing I want to find is a load with a very low standard deviation(0 to 15).This tells me that I have a good powder,primer,bullet weight combination. If a load starts out with poor S D's (first 2 or 3 rounds) I abandon it and save the rest of that batch for fouling rounds Once I have low S D's then I play with primers and bullet seating depths to get the best groups at 200 or 300yrds. While fine tuning your load only change one component at a time. That is why I clean,shoot 1 fouling shot,dry patch to remove carbon,and shoot 3 or 4 for S D's drypatching only between each shot. Before I start testing the next load I do a good solvent clean and start the process over. Note!! even though you get good S D's your groups may not be good because of bullet quality or seating depth ,So I will try other bullet brands of the same weight after I try different seating depths. Using this method I have managed to get all of my rifles under 3/8ths MOA and 4 under 1/10 MOA (30/378 .092 ,7 WSM .077 , 7-08 .054 and a 416 buff to .034 ). Some of the other guys have other ways of getting good accuracy and maby they will chime in and help with some other ways to get the most out of your rifle/pistol loads. J E CUSTOM [/QUOTE]
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