So my 7/8-oz. charge bar for the MEC Sizemaster arrived in the mail yesterday along with some other goodies (bushings, bottle supports, etc), so I tossed in bushing 28, which should throw ~ 16.4 grains of Red Dot -- just about perfect for a low-recoil 7/8-oz. load.
Except neither bushing nor charge bar threw the proper weight -- both were quite a bit under. The 7/8-oz. charge bar was throwing about 10-14 grains light (not a big deal), but the bushing was throwing as light as 15.3 grains -- over a grain short.
Eventually I just stepped up to bushing 29, which worked just fine, but now I'm curious -- what's the greatest amount below the recommended powder weight you view as a safe load? 5%? 10%? 15%?
Fish.
Except neither bushing nor charge bar threw the proper weight -- both were quite a bit under. The 7/8-oz. charge bar was throwing about 10-14 grains light (not a big deal), but the bushing was throwing as light as 15.3 grains -- over a grain short.
Eventually I just stepped up to bushing 29, which worked just fine, but now I'm curious -- what's the greatest amount below the recommended powder weight you view as a safe load? 5%? 10%? 15%?
Fish.