I had a G33 that did the same thing. Glock re-designed their 357 feed ramp to more of a flat profile. The older profile was sort of a semi circle, like the 9mm feed ramps.
Every brand of HP and some FMJ would not feed properly in that 33. I got my money back from the guy I bought it from. He sold it to me and knew it had issues.
I could have sent it back to glock but I was too pissed.
I tried 4 different magazines, all with latest followers and one mag with the old follower. I put a 27 barrel in it and it fed flawless. I THINK, that the ramp was cut a hair too short causing the rounds to hang up.
The Second Amendment is the reset button of the United States. -Doug McKay
Last edited by txgunguy; 10-08-2012 at 16:54..