The top 2 shells are from a reload 40 cal. 150 grain, not quite P load. Bottom is factory remington. Shot out of a Springfield armory 3.8 inch XDm. Looks like the firing pin is dragging on the primer. My son in law reloads for me. He has never seen this before. Would this be due to the hotter load or a pistol issue. Since the factory load didn't show a problem, am thinking the springfield isn't good for this load. Haven't tested this on a different gun yet but will shortly. Any insight would be appreciated.

Looks like the firing pin hole in the breech face is a little on the large side.  None of mine show the primer flow back into the firing pin hole like that.

The Remington rounds had a small drag mark at the edge of that circle but it was way more pronounced with the reloads.

I'd try a stronger recoil spring first, to see if that delayed the slide's rearward movement which is dropping the barrel down before the firing pin has retracted.

Bingo

If you think the reloads are hotter back them off and see what happens. For my routine range ammo my load program is to start at the minimum published load go up until the gun functions add 2/10 of a grain beyond this and stop. No reason at all to beat up a gun with max loads

Primers showing signs of overpressure.  There is no such thing as a +P for the .40 for a reason.