Your carrier looks normal except for the major ding/flat spot. It does appear that it was dropped onto a hard surface or suffered some similar fate. A couple of times.Updated the picture.
I had a bent cocking tube and canted sights, like yours the windage maxed out. I Sent it to Mr. Walters at PCS, I had the cocking tube straightened, RCM Barrel installed, and a paddle mag installed. I love it!!Only thing that I have encountered with C93's, as far as problems go, is the barrel/front trunnion may not be installed inline with the receiver. I had one in the past where I ran out of rear sight adjustment and still didn't have it on paper.
As for ammo, I have found that the gun runs steel case ammo great.