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Rifles, Reloading, Optics, Equipment
Reloading
Number of reloads effect impact
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<blockquote data-quote="kc0pph" data-source="post: 629521" data-attributes="member: 35934"><p>I believe the Most correct way to say this is every time you fire your brass the case capacity gets slightly more. Brass is moved around and we even trim for OAL. Well that brass will change POI because case cap has changed (Everything is to outside dimensions so less material same outside dimensions means more case cap). </p><p></p><p>The Flash Holes get slightly larger with each firing and the web gets pushed back as well, primer pockets get loose. </p><p></p><p>Precision shooting is not about your load and rifle combination (although a big part) it is about consistency. You can not be consistent with the above mentioned faults. </p><p></p><p>The Wrench in the works: Take Your brass that you have CAREFULLY ensured is Identicle. You have 100,000 pieces and you need 10. Check them for everything to ensure they are perfect. Take them to a lab where they have expensive tools that I dont even know about. Ask them if all 10 are identicle. I bet even OAL will be different because they might measure in pico Meters when you measure in ten thousandthsn of an inch. </p><p></p><p>The Point is there is a lot that is out of our hands, but the simple things that we can control easily lets control. You are doing a good thing by sorting brass by times fired. Will it change your POI? I bet You Cant shoot well enough to tell. (No disrespect but not sure anyone could tell 2x for 3x.) </p><p></p><p>Bench rest shooters shoot 1/10th moa and i do not believe your could really tell on their targets either. But then again I will get someone who says your POI will change 4.723 MOA per firing. </p><p></p><p>To Sum Up.</p><p>Do what You can do and what is easy to make sure Round 1 is identical to round 2. The longer your shots the more you care.</p></blockquote><p></p>
[QUOTE="kc0pph, post: 629521, member: 35934"] I believe the Most correct way to say this is every time you fire your brass the case capacity gets slightly more. Brass is moved around and we even trim for OAL. Well that brass will change POI because case cap has changed (Everything is to outside dimensions so less material same outside dimensions means more case cap). The Flash Holes get slightly larger with each firing and the web gets pushed back as well, primer pockets get loose. Precision shooting is not about your load and rifle combination (although a big part) it is about consistency. You can not be consistent with the above mentioned faults. The Wrench in the works: Take Your brass that you have CAREFULLY ensured is Identicle. You have 100,000 pieces and you need 10. Check them for everything to ensure they are perfect. Take them to a lab where they have expensive tools that I dont even know about. Ask them if all 10 are identicle. I bet even OAL will be different because they might measure in pico Meters when you measure in ten thousandthsn of an inch. The Point is there is a lot that is out of our hands, but the simple things that we can control easily lets control. You are doing a good thing by sorting brass by times fired. Will it change your POI? I bet You Cant shoot well enough to tell. (No disrespect but not sure anyone could tell 2x for 3x.) Bench rest shooters shoot 1/10th moa and i do not believe your could really tell on their targets either. But then again I will get someone who says your POI will change 4.723 MOA per firing. To Sum Up. Do what You can do and what is easy to make sure Round 1 is identical to round 2. The longer your shots the more you care. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Number of reloads effect impact
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