Speer Gold Dot 22 WMR (22 Mag) 40gr HP Rimfire Ammo - 50 Rounds - You've never seen rimfire like this. Speer Gold Dot Short Barrel 22 WMR is designed to work in barrels as short as 2 inches and transforms the cartridge into a legitimate self-defense option. The rounds expand reliably and penetrate to depths needed to stop a threat. Maximum performance in barrels as short as 2 inches Reliable feeding in sub-compact handguns Consistent expansion and penetration Gold Dot hollow point bullet