Along with testing loads in 3.5" plastic, later tested same loads in 3" RMC brass cases; and with 600gr slug, same wt 4227 and 7383 surplus powders got same 2100 fps.I got a MEC Super Sizer coming to size base of plastic and RMC cases. Both are hard to resize with regular die, but this will save time and allow many more firings of the cases.Just got 3.5" plastic for dime each, and this sizer will allow as many firings as the RMC brass.Ed
