I am having trouble with loads for mbc 140 and 158 gr Hi-Tech coating projectiles. I am running 14 grains of 2400 with cci small pistole primers. From all the info I can find this load should be well within the range for both.
I was running 2400 Hercules brand with jacketed bullets with the same lot of primers with no problems. Switched to the new can of alliant and about 1 of 5 rounds sticks in the forcing cone locking up the revolver. Also had one click bang. This made me quite as I know that bullet was unseated when the powder charge went off.
Rounds are crimped using a Lee factory crimp die.