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Rifles, Reloading, Optics, Equipment
Reloading
Case capacity vs pressure
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<blockquote data-quote="QuietTexan" data-source="post: 2370038" data-attributes="member: 116181"><p>Per ADG's current website:</p><p></p><p></p><p>Don't rethink it, you're doing the correct process for load development by using a starting load and working up. The 10% reduction recommendation is if you're changing brass on a known load, not a starting load. For example, I hit max pressure at 61.0gn in a 30-06 with thrice-fired Hornady brass, and changed to Peterson brass. I dropped from 61.0gn to 56.0gn and moved back up and found where speed and pressure were in the new brass at 60.0gn.</p><p></p><p></p><p>Undercharging can definitely cause pressure spikes, if there's too much air space in a case a larger amount of powder can ignite faster and cause pressure to spike. That's why when loading subsonics you work DOWN towards a speed target and powder charge instead of trying to start slow with a super small charge and work up to 1050fps. Also so you don't stick a bullet in the barrel, but that's a different issue.</p></blockquote><p></p>
[QUOTE="QuietTexan, post: 2370038, member: 116181"] Per ADG's current website: Don't rethink it, you're doing the correct process for load development by using a starting load and working up. The 10% reduction recommendation is if you're changing brass on a known load, not a starting load. For example, I hit max pressure at 61.0gn in a 30-06 with thrice-fired Hornady brass, and changed to Peterson brass. I dropped from 61.0gn to 56.0gn and moved back up and found where speed and pressure were in the new brass at 60.0gn. Undercharging can definitely cause pressure spikes, if there's too much air space in a case a larger amount of powder can ignite faster and cause pressure to spike. That's why when loading subsonics you work DOWN towards a speed target and powder charge instead of trying to start slow with a super small charge and work up to 1050fps. Also so you don't stick a bullet in the barrel, but that's a different issue. [/QUOTE]
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Case capacity vs pressure
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