I read the warning label inside my PT 22 PLY box warning against the use of "high velocity" 22 LR ammo. Not sure what number constitutes high velocity. I have a bunch of CCI Mini Mags @ 1235 fps, CCI Standard Velocity @ 1070 fps, Remington Golden Bullet @ 1280 fps and Remington Thunderbolt @ 1255 fps. Which(if any) are considered high velocity? Any ideas? Thanks, Mark.