Surely. The .30 Carbine can be used as a .357 projectile and the 5.7 makes a good 200gr JSWC for the Mosin, Enfield or Arisaka (others, too, if sized accordingly).
Very popular on CastBoolits swaging forums. From basic using dies you probably already have up to spending thousands to make 22 LR into .224” projectiles. Sexy stuff
Ahhh, another reason to love the .40 cal. As if I needed another!
.40 is a great round in a full or mid sized hand gun. Not so much in a small gun.
But I have to think if you could do it with a 40, you could also do it with a 45? ( which is my favorite pistol caliber)
I carry a 40.... i wont bother reloading for it.
I reload everything but 40.
I dont really “shoot” 40 other than to make sure i can still hit what Im shooting at with it.