Good idea this...

My Ratty is more than happy with Crosman HPs in .22 at 14.3gr and hates RWS. Seem to get a perfect barrel fit with the CHPs, oddly enuf!

The 850 works best with RWS SHP or Superfields. The SHP work really well.

Both utterly hate TAC2- bought a few to test out as they looked "interesting"-I know they aren't really a CO2 pellet, but worth a try. Hopeless FPS/Ft Lb in the Ratty, and did not agree with the 850's bolt action at all.

The S&W 586, well Laza's usually, but for plinking, a CHP in .177 does the job very nicely.