Quote:
Originally Posted by Scott@Synergy
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One of the things you have to watch out for when doing compressed loads. When seating heavy (longer) bullets. Is your OAL. Sometimes the powder will push the bullets back out of the case after seating. Measure your OAL, wait about 30 minutes and check again. You have to have good neck tension or a heavy crimp to hold the bullet in place.
As for burning rate. Ideally you what the powder to burn within about 3" from the end of the barrel. Burn too quickly, you get low velocity. Burn too fast, you get big muzzle flash, and a dirty barrel.