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Rifles, Reloading, Optics, Equipment
Reloading
New to the forum, 6.5-284 question
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<blockquote data-quote="rscott5028" data-source="post: 692314" data-attributes="member: 24624"><p>How does it do with factory ammo? e.g. Black Hills or HSM? </p><p> </p><p>48.0 grains of h4831sc and 2650 fps is pretty low. </p><p> </p><p>I too see guys with long barrels getting >3000 fps using around 53 gr of h4831sc. </p><p> </p><p>My max is around 51.3 grains of h4831sc in a couple of rifles with Lapua brass and either Fed 210m or CCI primers running around 2900 fps. </p><p> </p><p>I doubt you have a headspace issue. But, it's easy enough to measure how much your brass is growing before/after firing/sizing using Hornady or Sinclair comparators. </p><p> </p><p>I might suspect your scale needs calibrating. But, that'd mean your chrony is off as well. </p><p> </p><p>High pressure with low velocity using several powders is just another indication that something's not right here. </p><p> </p><p>With a new rifle, I wouldn't expect a huge buildup of copper fouling which can increase pressure somewhat. I assume you're cleaning/breaking in the barrel? </p><p> </p><p>You might want to double check your trim length and possibly measure your chamber to make sure your neck isn't cut short or otherwise pinching the case upon firing thus causing a pressure spike. I've used Cerrosafe for this. But, there are other tools and home made gizmos for measuring. </p><p> </p><p>While unlikely, Savage has cut bad chambers and even had barrels with the rifling not running the full length of the bore. </p><p> </p><p>-- richard</p></blockquote><p></p>
[QUOTE="rscott5028, post: 692314, member: 24624"] How does it do with factory ammo? e.g. Black Hills or HSM? 48.0 grains of h4831sc and 2650 fps is pretty low. I too see guys with long barrels getting >3000 fps using around 53 gr of h4831sc. My max is around 51.3 grains of h4831sc in a couple of rifles with Lapua brass and either Fed 210m or CCI primers running around 2900 fps. I doubt you have a headspace issue. But, it's easy enough to measure how much your brass is growing before/after firing/sizing using Hornady or Sinclair comparators. I might suspect your scale needs calibrating. But, that'd mean your chrony is off as well. High pressure with low velocity using several powders is just another indication that something's not right here. With a new rifle, I wouldn't expect a huge buildup of copper fouling which can increase pressure somewhat. I assume you're cleaning/breaking in the barrel? You might want to double check your trim length and possibly measure your chamber to make sure your neck isn't cut short or otherwise pinching the case upon firing thus causing a pressure spike. I've used Cerrosafe for this. But, there are other tools and home made gizmos for measuring. While unlikely, Savage has cut bad chambers and even had barrels with the rifling not running the full length of the bore. -- richard [/QUOTE]
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Reloading
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