In looking at the gunmart article DGM cited, it seems to me that the shell crimp is particularly deep and the taper very pronounced. This should increase pressure and help with inconsistent burns with such a light load. I think I should go readjust my MEC. Been shooting 3/4 oz loads for a couple of years to try to stem a flinch and minimize ammo cost. Usually works great, but I do sometimes have a weak sounding report. I suspect some of the older hull are just not holding a strong enough crimp.

Must say that in the full choked Cashmore 3/4 of 8's has broken some targets that were way out there, however, I do take along some 7/8 of 71/2's in competition.