I've heard that CCI Standard Velocity .22LR ammo will jam in many semi-auto .22LR rifles. Any truth to this? I find it for sale occasionally and wondered if it was worth buying. It goes for about five bucks a box of 50.
I have shot a lot of CCI Standard Velocity 22LR ammo in a Ruger 10/22 and Marlin Model 60 and never had a problem... Are you sure you're not thinking of their CB ammo or newer Quiet-22 ammo? That won't cycle the action on a semi-auto but standard velocity ammo is not low velocity and generates plenty of pressure.
CCI Standard Velocity ammo - 1070 fps
CCI Pistol Match ammo - 1070 fps
CCI Green Tag ammo - 1070 fps
CCI Subsonic HP ammo - 1050 fps
CCI Select ammo - 1200 fps
CCI Mini-Mag HV - 1235 fps
CCI Quiet-22 ammo - 710 fps
CCI CB Long ammo - 710 fps
Back when I was a kid there was very little high velocity 22LR ammo brands and the stuff that was available I wouldn't spend the extra money on. 22LR ammo was the cure for lower velocity 22 Long ammo and standard velocity ammo from all the companies cycled semi-autos just fine.
Granted, there are some semi-auto rifles that came out in the past few years that either recommend or require high velocity ammo to insure reliability but that is just the design of the rifle. If the manufacturer doesn't recommend or require HV ammo for your rifle you are good-to-go. Of course the only way to know for sure is to buying a box of 50 if you can find them and give it a try with your rifle. (you didn't tell us semi-auto which rifle)
Are they really @ $5/box these days? wow!