Not always a good idea to start at a full case. We were sub loading a 7.62x39 and discovered that if a cast projectile exceeds 1400fps without a gas check, it turns to very small molten lead droplets and turned a rifle into a 30 bore smooth bore. It took ages to clean the lead out of the rifling to the extent we almost rebarreled....That was about 11gr trail boss. It seems about 8gr is pretty good. but we also used a 180gr too. (And we gas check now as well...)
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