[Farmer Dean]

NEI used to make a bullet mold for .50 Browning.Finding a load that would function the weapon would be a challenge.

[Twinkie]

As long as you can get ammunition for your gun, I would do
it that way. Too much can go wrong to risk it.

I just watched my dad pouring his own bullets for the
Smith & Wesson revolver, so it worked for something that
old & reliable. I suspect the molds he used were also ones
that his great grandfather used to mold his bullets!

Daddy was a combat veteran of WWII; and I imagaine the
bullets he used then were Government Issue.

[archy]

Finding a load that would function the weapon would be a challenge.

With a 650-grain bullet, try 248.0 grains of Hodgdon's H50BMG with a CCI 35 BMG primer loaded 5.450" OAL, which gives 3,029 fps and functions just fine in the two M2 heavy barrel guns and one M3 aircraft MG I've tried it in. The trick is not to find a load that functions the recoil-operated gun, but one that does not quite function, making single-round fire with an electrically-fired [M55 quad or aircraft mount] gun without spade grips and a bolt lock possible. We used to pull the same trick with the 20x138mm Lahti and Solothern antitank rifles when their ammo had gone a little past what .50 M2 costs now. But price some MK 211 .50 Raufoss and .50 M2 ball/tracer [Federal offers in in ten-round packs] doesn't seem so high.