Well the first ammo I tried in my new 17 HMR was the Winchester offering with the 17 gr. Varmint HV. I got 1 out of 5 misfires, all went off on the second try. The rifle is a Savage 9317 and accuracy was satisfactory but the misfires were not. Not knowing why the rifle was misfiring I took the bolt apart and smoothed everything up that moved, degreased all parts and reassembled. Still the Winchester stuff stayed at the original rate of 1 in five misfires. Next up was the A17 from CCI. 3 shots into 3/4 inch and out of one box of ammo 1 misfire. Last and best is the Hornady XTP 20 gr. round. What a tackdriver! No misfires and 3 shots into 1/2 inch group after group. This round hit just a bit higher than the 17 gr. bullets, less than an inch. Hard to believe an inexpensive rifle like this Savage can shoot this well. Very light rifle also. Magazine is a bit funky but it functions perfectly, trigger is plenty good enough.