I load my own M2 ammo using GI LC69 Brass and Surplus M2 bullets. The powder of choice is IMR 4895. I have not had any trouble with the load I use as I keep it moderate. There are couple of things that you need to keep in mind when loading for the M1icon top of the list is to check each and every round for high primers to avoid a firing out of battery and probably even better is to also use the CCI military style primer with the thicker cup material.

Skeet1