If it started out fine and has gotten worse, it is not a angle problem, it is a spring problem, angle problems are bad from the gitgo. try a new mag spring and a new recoil spring. when you order them get a couple of different weight springs. i would say 18, 20 and 21-22. try these, commander springs start to fail after about a thousand rounds or so. IMHE, most of the time, fresh spring should be the first thing done to a balkie gun after a good clean and lube. you can try new spring for under ten bucks and save yourself the first thing a good smith would do anyway and charge your forty dollars to do. Not bashing smiths, but why not do the first thing on the list yourself.
Then look at the feed ramp, and get a dremel. YUP!! I said get a dremel, pull the barrel out of the slide and get a polishing tip, a cratex rubber wheel in the finest grit and just lightly buff up the feedramp. and just touch TOUCH the junction of the ramp to the chamber. Now the Cratex part is important. They will not remove material, but rather allow you to polish the ramp with out changing the angle, Now assemble the pistol load the magazine and while aiming in a safe direction, pull the slide back and release it on a fresh round. does it go in? if so good. If not, stop and look at where it is hitting. Has the gun raised a burr somewhere? Is there something obvious that is stopping the round from entering the chamber?
Now that the AWB has passed, remember all those ten round mags made for P13's? Go buy one. this ten dollar mag will be your tester. examine the new mag compared to the old mag, Is there wear on the top of the feed lips from the slide rubbing over it? are the lips the same shape, are the same length. On some mags. the length of the feed lips is too long, preventing the cartrige from releasing soon enough to rise up over the feed ramp. take the dremel and on the cheap mag slightly shorten the amount of lip that is bent over to retain the shell. we are talking a 1/32 at most. just touch it and smooth it and try it again. If you wish to try your gunsmiths suggeston that the mag is in too far, take a file and slightly remove some material from the top of the mag catch slot, thus allowing the mag to drop a 1/64" see if that works.
Lesson one. Do only one thing at a time.
lesson two. only grind, cut, file, polish things that you can replace easily.
Lesson three start out with the cheapest things first.
Lesson four, never do anything to a dirty gun.
If this were my gun, I would 1) change springs, 2) Buy a ten rounder, and go to the range. shoot two or three boxes. if it persists with all mags, 3) clean whole gun thoroughly. polish feed ramp, 4) shorten the feed lips of the mag, (the cheap one) Go to range, shoot the gun, if problem persists. file the mag catch slot. if it fixes the problem, call Paraord and describe what you have found and ask to return the magazines. ask them to review the mags and see if they meet specs, They have been pretty good about fixing things that are not right for friends of mine.
If this does not fix the problem call paraord again, tell them what is going on and ask the to review the gun, tell them exactly what ammo you are shooting, let them touch it first. They are usually faster and cheaper than most smiths you can find.
PS, I have also found that the new WWB ammo i have been picking up for blasting is horribly dirty, this was not the case before, but it is now, and I have noticed in both my 40 beretta Centurian and my para's that about one hundred rounds is all I get before I need to hose the gun out with gun scrubber and a brush...with my handloads using Titgroup, I can go a thousand rounds np. when they get that dirty, FTF and FTE start to happen. I have quit using the stuff and gone to either handloads or black hills. Black hills is not as clean as titegroup, but close. YMMV
Thanks........Larry
This one is a 10mm.