The Sierra 180 Pro-Hunter flatbase and the Hornady 150 Spire Point both feed very well through anything I have when seated to the OAL of a Ball round.

Neither is MilSpec, but if they feed, then MilSpec will feed also.

Once in a while, gentle tweaking of Mag Lips on a new rifle is useful.

I am running a couple of P-'14s, 5 or 6 Rosses and a dozen or so LEs and LMs, all between 1894 and 1945.