Sorry, 4.2 gr RSC 180 gr blue bullet, 1.18 OAL. And yes the pf goes down as the temp goes up. Made 170 pf at 40 F had to add .2 gr to make 170 pf at 65 F.
Check to see if the magazine tube is square. I had to square up an Infinity tube that would not let the trigger move. Found where it touched with a magic marker and squared it in a vise.