Thread: My Shrunken Wood... need advice on No 4 Enfield.

Flat base seems to be the ticket, I was told that on startup the flat base makes the bullet expand as it jumps to the rifling, with boat tails the shape makes them shrink and set up erratically, couple that with varying degrees of throat erosion and a wide selection of bore diameters and you can see why copying the style of the mk VII ammo makes sense.