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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Velocity Question?
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<blockquote data-quote="Coyboy" data-source="post: 513161" data-attributes="member: 3733"><p>Austin, Don't take to much stock in high spreads early on in a barrels life. Barrels do in fact brake in during the first 50-100 rounds and speeds will generally increase and level off at the 100 round mark. I usually reserve load development until I hit this point, and the starter load in a 6.5x284 is usually between 50-51.5 grains of H4831sc.</p><p></p><p>You won't believe it but when I started my 30" f-class gun with 51 gr of h4831 it shot at 2875 fps, that slowly increased to 2975 and caused me fits at the team state camp match last fall. I had 12 rounds thru that gun and put another 120 thru it during a match. Verticle climbed thru the first day, was a bit better on the second, dope from saturday was not the same as sundays.</p><p></p><p>I still use close to the same load, 51.3 just modified my seating depth and managed to take first in a 24 person field on Memorial day. with about 400 rounds down the pipe. </p><p></p><p>I have now backed my next batch of loads down to 50.6 as it is showing some pressure in the warmer weather.</p></blockquote><p></p>
[QUOTE="Coyboy, post: 513161, member: 3733"] Austin, Don't take to much stock in high spreads early on in a barrels life. Barrels do in fact brake in during the first 50-100 rounds and speeds will generally increase and level off at the 100 round mark. I usually reserve load development until I hit this point, and the starter load in a 6.5x284 is usually between 50-51.5 grains of H4831sc. You won't believe it but when I started my 30" f-class gun with 51 gr of h4831 it shot at 2875 fps, that slowly increased to 2975 and caused me fits at the team state camp match last fall. I had 12 rounds thru that gun and put another 120 thru it during a match. Verticle climbed thru the first day, was a bit better on the second, dope from saturday was not the same as sundays. I still use close to the same load, 51.3 just modified my seating depth and managed to take first in a 24 person field on Memorial day. with about 400 rounds down the pipe. I have now backed my next batch of loads down to 50.6 as it is showing some pressure in the warmer weather. [/QUOTE]
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Velocity Question?
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