If your rifle is in a pistol caliber you can trim your cases to increase magazine capacity. My '94 will cycle .45 Colts trimmed to acp length.
Holy pressure curve!!
Sorry, loaded with proper acp load data of course. I was actually told that trick from a a SASS gamer who wanted to safely reduce blackpowder loads. Of course you cannot have any airspace in a blackpowder cartridge ( or kaboom), so he just started trimming his brass back.