I stumbled across this on the Internet a couple years ago and played with it. Can make a round for 22 ammo prices.
Take a .490 round ball, squeeze it through a .458 bullet sizing die. If you set it on a gas check before you size it it comes out with a gas check (go figure ) Tumble lube in Lee liquid alox. Loaded with 12gr unique it penetrates through an 8" round of fir firewood, 7gr penetrates 4", 4gr bounces off but makes a 1"deep dent. They're comfortable and quiet to shoot. They hit the same point as normal loads in my buffalo rifle but high in my marlin. The 12gr load shoots a 178gr projectile close to the speed of sound, placed in the lungs would kill any deer but I'm not recommending trying. I've shot hundreds of these rounds, they're fun, cheap and very easy on brass.
Take a .490 round ball, squeeze it through a .458 bullet sizing die. If you set it on a gas check before you size it it comes out with a gas check (go figure ) Tumble lube in Lee liquid alox. Loaded with 12gr unique it penetrates through an 8" round of fir firewood, 7gr penetrates 4", 4gr bounces off but makes a 1"deep dent. They're comfortable and quiet to shoot. They hit the same point as normal loads in my buffalo rifle but high in my marlin. The 12gr load shoots a 178gr projectile close to the speed of sound, placed in the lungs would kill any deer but I'm not recommending trying. I've shot hundreds of these rounds, they're fun, cheap and very easy on brass.