by JohnV » 23 Feb 2023, 4:15 pm
I am not a pistol man but too much unburnt powder indicates low chamber pressure or powder too slow or barrel too short or even bullet diameter too small .
Try a harder crimp and if that don't help try a faster powder with an appropriately adjusted charge weight . A few grains of unburnt powder is not uncommon . Revolvers loose some pressure at the gap compared to pistols and rifles firing from a closed chamber .