I’m casting from an accurate mold for my 45-70. Alloy shot is water quenched wheel weights. The bullets drop from the mold at .4615 according to my digital calipers. Lube is 50/50 beeswax and olive oil. Load is 12 grains of tightgroup. Accuracy is 2moa at 100 yards. Is this erosion at the bullet base normal? I get very slight leading with this load that cleans up easily.