Quote Originally Posted by Parashooter View Post
No, the Mk.VII bullet features a flat base. The boattail version was the Mk.VIII (Mark 8).
Yup, and the only difference between Mk VII and Mk VIIz is the propellant. MkVII uses cordite and Mk VIIz uses nitro cellulose ball, flake or stick powders which is what the OP indicates will be used in his loads. Cordite is a bit hard to get these days.