RE: WHAT 9MM FOR VARMINTS?
out of my ruger PC9 carbine ive used American (IMI) 90 grain frangible 9mm loads I believe they have a muzzle velocity of 1600 fps. ive shot jack bunnies out to 100 or so yards with these they are quite accurate from my carbine about 1 to 1 1/2 inch groups at 100 yards with a red dot scope. when they hit a jack they blow apart leaving the jack looking like a 40 grain V-max out of a 22-250 just hit it. IMO these loads give the best range and terminal performance for varmints with a hangun caliber.