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puma guy wrote: ↑Mon Dec 26, 2022 2:48 pm Before I answered I had to look up the Savage 64 to discern action type. ie bolt, pump, lever, semi-auto.
Being a semi-auto that states LR it's possible that it's made to function reliably only with high velocity ammunition, BUT that being said you can experiment with standard velocity ammo in differing brands to see if the action will cycle them reliably. I'll go out on a limb and say sub-sonic and low velocity rounds would not cycle well if at all. I experiment with my .22 semi LR auto pistols to see what ammo they will shoot with reliable ejection and feeding. Shooting standard and low velocity rounds should not do any harm to the rifle, but you'll most likely have to cycle the bolt manually. You should also try several different brands of .22LR to test for the best function and more importantly the best accuracy in your rifle. It should handle HV 40 grain solid nose or 38 gr hollow points with no problems.

Greybeard wrote: ↑Mon Dec 26, 2022 9:59 pm I've found the only was to know with semi auto 22s is to test them with various types. The bulk box ammo has proven to be the most problematic. If important that the gun goes bang (almost) every time, my experience says the 100 round packs of CCI have the fewest misfires. My 2 Ruger 10/22s generally run fine on standard (subsonic) velocity CCI. An Appleseed instructor once told me that it is slightly more accurate than the "high velocity" stuff due to the fact that the boolits never have to fall back through the turbulence of the sound barrier.