Reminds....BTW, my 3 revolvers with too LONG of a factory FP were.....2x 1860 R-Ms, 44Colt and 1x 1851 R-M, 38Spl.
All three pierced primers until remedied.
My OT has a cone type FP & has worked perfectly.
Slim
Oh...Additional things come into with pierced primers such as as headspace... unless you have an M203 grenade launcher which automatically corrects excess headspace.