I made up a .500NE 3 1/4in on a New England/ H&R single shot & shot that a lot, it was like being in a Car Smash each shot with full Nitro loads & I know a bit about reloading that case both Nitro & light Nitro/BPE loads !
Is it a Double or single shot, I'm thinking a single as you are calling it by the .50 Eley name ?
Bookmarks