r85 won't chamber bb

[shinyheed]

ive an r85 and the gears look fine, the tappet plate is new but the tappet plate doesnt seem to move rearward enough to chamber a bb , it will at times but hardly ever

any ideas what need done?

thanks

i think ive sorted it, ive took a tiny bit off the end of the brass air nozzle and cut a couple of turns off the spring for the tappet plate so it can move more freely and its working well

ran a whole magazine through it on auto and no problems , and its not too bad on semi (which according to reviews is a problem on these anyway)