Kraschenbirn
12-20-2009, 10:53 PM
Was loading small batches of .38-55s to chronograph...same powder charge/boolit but different primers, with and w/o paper wad over flash hole...and noticed that some cases seem to have slightly less capacity.
Cases were freshly trimmed and charges of (sifted) Goex FFg very carefully measured before loading using 24" drop tube but, now and then, powder level in a case (before seating overpowder wad) would appear approx. .060"-.075" higher than the norm. Dumped the first two that I noticed and checked charges for weight but found them within +/- .1 gr. By the time I finished, I'd found a half-dozen more for a total of eight out of the hundred cases I'd prepped for testing.
Went ahead and loaded the "small" cases but marked them with a Sharpie and will chrono them separately and compare readings against those for "standard" cases.
Curious if anyone else has encountered this?
Bill
Cases were freshly trimmed and charges of (sifted) Goex FFg very carefully measured before loading using 24" drop tube but, now and then, powder level in a case (before seating overpowder wad) would appear approx. .060"-.075" higher than the norm. Dumped the first two that I noticed and checked charges for weight but found them within +/- .1 gr. By the time I finished, I'd found a half-dozen more for a total of eight out of the hundred cases I'd prepped for testing.
Went ahead and loaded the "small" cases but marked them with a Sharpie and will chrono them separately and compare readings against those for "standard" cases.
Curious if anyone else has encountered this?
Bill