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Rifles, Reloading, Optics, Equipment
Reloading
velocity FPS spread???????
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<blockquote data-quote="Boss Hoss" data-source="post: 171907" data-attributes="member: 5060"><p>I shoot 1k competition---I have won State Championships before, hold the range record for closest to the center of the x in last years 1k championship in Missouri and I prefer a 10fps spread but will accept a 25 fps on my loads and I am using almost half the power you are in my 6.5 x 284. The first load shows promise now this is something that you HAVE to do when shooting over the chrono!!!!!!!!!!!!!!!!!!!!!!! Make sure you have the sight picture and the rifle is perfect in the bags then close the bolt and fire within a couple of seconds. Why you ask ------ well as the round sits in the chamber the round begins to absorb heat from the chamber and that will cause different pressures to form during ignition thereby causing velocity spreads and different impact points if shooting at extreme ranges. </p><p></p><p>All of this being said on my big boys that hold 80 to 110 grs of powder I keep working until I get a 5 shot string under 40fps… Most of mine are in the 10 to 25 range but my 300 Slowpoke (started out as a 300 RUM) is right at 38 fps on the high to low extreme spread but shoots .5 MOA at 600..</p></blockquote><p></p>
[QUOTE="Boss Hoss, post: 171907, member: 5060"] I shoot 1k competition---I have won State Championships before, hold the range record for closest to the center of the x in last years 1k championship in Missouri and I prefer a 10fps spread but will accept a 25 fps on my loads and I am using almost half the power you are in my 6.5 x 284. The first load shows promise now this is something that you HAVE to do when shooting over the chrono!!!!!!!!!!!!!!!!!!!!!!! Make sure you have the sight picture and the rifle is perfect in the bags then close the bolt and fire within a couple of seconds. Why you ask ------ well as the round sits in the chamber the round begins to absorb heat from the chamber and that will cause different pressures to form during ignition thereby causing velocity spreads and different impact points if shooting at extreme ranges. All of this being said on my big boys that hold 80 to 110 grs of powder I keep working until I get a 5 shot string under 40fps… Most of mine are in the 10 to 25 range but my 300 Slowpoke (started out as a 300 RUM) is right at 38 fps on the high to low extreme spread but shoots .5 MOA at 600.. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
velocity FPS spread???????
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