You can get fairly accurate and consistent loads with a progressive, but there is significantly more QC in a singe stage, particularly when you are weighing each individual charge to be as consistent as possible. .1 grain of powder (if your charge thrower can stay that accurate) makes a hell of a difference at 400+ yards when you are trying to keep that sub MOA grouping going on, unless you found a velocity node that has the fluff room for that much discrepancy. EX - 27.3gr = 2460fps, 27.6gr = 2470 fps (normally 20-30 fps spread per .3 gr).
From my own experience on a progressive loading 5.56, the first 5 and the last 5 were the worst for inconsistencies in sizing, seating, and crimp since there were open slots on the shell plate, making a resistance and flex change.
From my own experience on a progressive loading 5.56, the first 5 and the last 5 were the worst for inconsistencies in sizing, seating, and crimp since there were open slots on the shell plate, making a resistance and flex change.
Sticks
Catchy sig line here.
Catchy sig line here.