Ok, from looking at the first pic of the new pix, you clearly have a nose-dive at a point when the case should be up against the feed lips. If you look closely, you can see that the slide stop appears to be in contact with the bullet. If this is the case, there should be copper smears on the slide stop. The slide stop should not be in contact with the bullet at any time. At this point in the feed cycle, the slide stop should be barely visible under the bullet, not pressing against it.
Of course, if the slide lock is extending too far into the frame and is in contact with the bullets, you should have instances of premature slide lock and you aren't reporting that.
Now, if there are no smears and the bullet is clearing the slide lock, then we are back to the magazine.
Original 1911 mags have tapered lips that are narrower at the back than at the front This allows the round to feed with the nose higher than the rim. Newer, hybrid and wadcutter mags such as the one in the pic have lips that are less angled or are parallel for about half their length. This keeps the round in a more horizontal position and holds the nose down. Too much of this and the round will nose dive into the ramp.
You can get too much of this if the mag follower/mag spring does not keep enough pressure on the round to force the nose up as soon as possible. Or if the follower tips forward so that the rims ride higer than the nose. 8 round mags hold 8 rounds because they have shorter follower tails. which allows the follower to be pushed lower in the mag to accomodate the 8th round. But it is the follower tails (along with a correctly shaped and tensioned spring) that keep the follower at the correct angle for each round. Shorter tails tend to allow the follower to tip forward and flatten out. Watch as you load your mags, on may 8 rounders, you can see the angle change and flatten out after the 5th or 6 round is loaded.