Buffalo Bore Colt New Police 32 S&W Long 115 grain Hard Cast Lead Flat Nose Pistol and Handgun Ammo, 20/Box - 10A/20

The use of jacketed expanding bullets in this weak cartridge would be a mistake as even if you could get a jacketed bullet to expand at these velocities, doing so would limit penetration significantly enough that the bullet would certainly under-penetrate and as a result would likely not be lethal to humans. Additionally, hard cast bullets create less friction inside the barrel than jacketed bullets and thus we are able to obtain significant velocity gains at lower pressures, than would be possible with jacketed bullets.