45-70 & 450 Bushmaster Cast Molds and Die Set

[mehavey]

Straight barrels (no gas ports), you can push even pure lead/bare-base (PC'd) out to 1,800-1,900fps
Gas ported, not so much -- unprotected trailing edge doesn't like that port all that much.
(No fouling in the gas tube/not the problem. Just trailing edge vulnerability -- especially if double stepped-edge/shelf like a bare gas-check base)

[TXCOONDOG]

Straight barrels (no gas ports), you can push even pure lead/bare-base (PC'd) out to 1,800-1,900fps
Gas ported, not so much -- unprotected trailing edge doesn't like that port all that much.
(No fouling in the gas tube/not the problem. Just trailing edge vulnerability -- especially if double stepped-edge/shelf like a bare gas-check base)

Good info and gives me a baseline. I'm more about accuracy than velocities so I'm going to start around the 1500fps range and work my way up.

I appreciate the help.

[TXCOONDOG]

I'm waiting on my accurate mold and still haven't found R7 powder. Do you think H4198 will work with the 280gr bullet?

[mehavey]

RL-7 appears to have come back/available... but expensive
Can you find any Vihtavuori N-110?

[TXCOONDOG]

I can find the powders online...it's trying to find them locally to try before buying enough to make up the hazmat fees.

[jmorris]

I went with the 458 Socom because it uses the same .458 bullets my 45-70 does. My 450 BM’s use .452 diameter.

[TXCOONDOG]

I went with the 458 Socom because it uses the same .458 bullets my 45-70 does. My 450 BM’s use .452 diameter.

You got a smile from me for the statement of went with 458 but indicated you have a 450 BM. I chose the 450 BM because it was in a bolt gun on the shelf at a good price until I can find a decent price on a 45-70 SS with a threaded barrel.