I've got over a dozen boxes of HSM 430 grain hard cast lead bulet factory ammo I got really cheap at a sale and essentially bought it for the Starline brass.
This ammo is stoutly loaded (not Buffalo Bore or Garrett stout but very close).........certainly well above the anemic green & yellow box 405 grain factory ammo.
I'm going to try the MP-221 on a diet of that stuff.
If I can get it to regulate firing the HSM ammo good enuf.
I have a feeling that those barrels will like hard cast bullets.
Hopefully the twist is fast enuf to stabilize 430 grain bullets.
How strong is the gun?
How heavy can its ammo be loaded?
