mrod pellets

so ive had my marauder 22 cal for about a week it shoots about 1.5 inch group at 50 yards with crosman premier hollow points and slightly larger with the pointed what pellets would you suggest trying to tighten my groups up 
i just ordered 4 diffrent pellets from pyramid air they are
1. jsb exact heavy
2.polymags
3.beeman crow magnums
4.kodiaks 


any others i should try thanks
 
Pellets:
Stock Marauder out of the box with no adjusting, tuning or chronograph work...JSB Exact 15.89 gr domed or JSB Exact 18.13 gr domed would be my guess. Might try an HN domed of similar weights. You got to be on the sweet spot of the shot string to get the consistency to be really more accurate as well.
If you want to hunt try some Benjamin pellets they are harder alloy similar to the Crosman. Stay away from pointed pellets if you want to be accurate is a general rule of thumb.