As much as I love the "WHACK IT NOW and take a video" idea with the above info I can and some hopefully helpful information.
From what it sounds like the frame ramp angel is not cut at the correct 31.5 degrees. It is more than likely too steep and or not deep enough so that when the round is striped by the slide coming forward it is jammed into the frame ramp causing bullet setback and or physically jamming.
ALL 1911 magazines tend to "nose dive" on the first round out of a fully load loaded magazine with each subsequent being presented at a slightly higher angle. I am guessing that this gun will jam more often with the first round out of a fully loaded 8 rounder.
SO how do you fix it???
Unfortunately this may be not so easy and it sounds like a smith already gave it the "college try".
OPTION 1: Have the frame ramp recut by a highly competent smith. Problem is that IF it is too steep, by decreasing the angle you move the frame ramp forward and remove the REQUIRED 1/32 ish gap between the frame ramp and the Barrel feed ramp. If this is the case a GOOD smith would have to weld up the frame or machine an insert into it. Good news is this might not be as expensive as it sounds.
OPTION 2: TRY an EGW "higher" mag catch. This will present the rounds from the magazine higher on the frame ramp and MAY help with feeding issues. Also try Quality 7 round mags. Reference the following SERIOUS info and analysis on 1911 magazines.
1911 Magazine Analysis: Feeding Time
OPTION 3: Machine the frame for an integral feed ramp barrel (WILSON/NOWLIN or PARA/CLARK as mentioned). This will theoretically be able to correct angle issue.
Welcome to wild world of 1911's. And you are learning why folks tend to shell out $ for high end guns. Bottom line is that they require precise fitting to be truly reliable. Up side is that a well tuned 1911 is a VERY capable sidearm.
And if it does not work out like ICHOKE said WHACK IT and post the video!
Its not the mag. When I tried it I had one or two rounds in the mag. Only ammo I have.
I need to buy some.
Bullet is nose first hard stop on the ramp. And lower part of chamber. Jammed tight. Two of these and ammo is useless. And probly a small grenade.