Remingtons work the best for me, I have yet to have a misfire with them. CCI's it seems like i'll get one or two misfires out of a tin, and i get an occasional misfire with the RWS caps, but as stated in an earlier post, they seem to fit on the tight side, and that may be due to not getting them fully seated on the nipple.
CCI magnums, I get alot of misfires, and the magnums open up my groups some, I guess my rifle doesnt like the hotter ignition from the magnum cap.
I get the best accuracy with the Remingtons.