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Rifles, Reloading, Optics, Equipment
Reloading
What is causing my flyer.
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<blockquote data-quote="emp1953" data-source="post: 1792486" data-attributes="member: 71817"><p>Not so much a rifle problem but a rifle preference. If you don't have a dial micrometer get one, Harbor Freight under 20 bucks. Load twenty longer than normal rounds with no powder, no primer. Gently load each round, single shot like, and close the bolt. Don't slam the round home. You want the bullet to gently contact the rifling and get pushed back into the case. Gently extract and measure each one. Hopefully all your measurements are within .001 - .002 of each other. Write down each of these measurements. Variations in length with this method could be due to crud where the lands start, non concentric round, inconsistent bullet dimensions, differing case neck pressure, any one or combination of things. Anyway once you get a consistent consistent length load a live group of 20 to an overall length of .020 less than what you got in your test measurements. I have the same rifle but with a factory barrel, it loves .020 off the lands. A friend of mine has his at .018. The usual process is to identify your accuracy nodes by mucking around with powder / bullet combinations, then fine tune it with seating depth. As bob4 mentioned, only change one thing at a time. Use the same mfg brass, same powder lot, same primer lot, same bullets. Keep a written log of what you've done. I've given up on a rifle without enough meticulous work and sold to a guy at the range who, within the next year is shooting warts off a pickle at 100yds. He was more patient and found the recipe that worked.</p></blockquote><p></p>
[QUOTE="emp1953, post: 1792486, member: 71817"] Not so much a rifle problem but a rifle preference. If you don't have a dial micrometer get one, Harbor Freight under 20 bucks. Load twenty longer than normal rounds with no powder, no primer. Gently load each round, single shot like, and close the bolt. Don't slam the round home. You want the bullet to gently contact the rifling and get pushed back into the case. Gently extract and measure each one. Hopefully all your measurements are within .001 - .002 of each other. Write down each of these measurements. Variations in length with this method could be due to crud where the lands start, non concentric round, inconsistent bullet dimensions, differing case neck pressure, any one or combination of things. Anyway once you get a consistent consistent length load a live group of 20 to an overall length of .020 less than what you got in your test measurements. I have the same rifle but with a factory barrel, it loves .020 off the lands. A friend of mine has his at .018. The usual process is to identify your accuracy nodes by mucking around with powder / bullet combinations, then fine tune it with seating depth. As bob4 mentioned, only change one thing at a time. Use the same mfg brass, same powder lot, same primer lot, same bullets. Keep a written log of what you've done. I've given up on a rifle without enough meticulous work and sold to a guy at the range who, within the next year is shooting warts off a pickle at 100yds. He was more patient and found the recipe that worked. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
What is causing my flyer.
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