Here's a little more on Perazzi firing pins...
The original firing pins up until several years ago, were a two piece pin, the same as today with this exception...The new style pin has the smaller diameter passing completely through the larger firing pin body. You generally can see the end of the pin at the rear. The older firing pin did not pass completely through, giving it the appearance of being a one piece.
Jumping briefly to the subject offiring pin holes, where did the idea that the firing pins will "wear out" the firing pin holes. Since the dawn of firing pins and primers, every manufacturer had a firing pin located in a hole and had no concern of wearing a hole, but the subject always arises when speaking of Perazzis.
There are two hole diameters on most guns, with the larger being for the firing body and the other being smaller for the pin that strikes the primer. With 30 years plus working on these guns I've yet to ever see the larger diameter "egg-shaped" because of the angle it passes through the receiver. Even those guns that might have 300k rounds shot through them. Frankly, I think its a nonissue.
As for the smaller diameter, it comes down to two issues. The first has to do with the material the receiver is made from, and the second has to do with the harder steel caps on the primers. During the 70's, 80's, and through the mid 90's, damage around firing pin holes was a rare occurance. Most everyone either purchased or reloaded their ammo using primers that had either brass, copper, or aluminum as the material of choice for the cap on the primer. I don't recall what CCI was using, but i would guess it was a chromed brass.
Somewhere around the late 80's to mid 90's, Federal began using a steel cap, and that was when we began seeing firing pin hole damage, particularly on Perazzi and Remingtom 3200. As other ammo manufacturers began switching to steel primers the problem has esculated, but mostly sicking with the Perazzi and 3200.
I guess time will tell if the newer Perazzis are made with a stronger alloy steel to diminish the damage. With most of the smaller manufacurers using material like 4140, the damage just doesn't seem to exist. I doubt the ammo manufacturers are going to change their reciepe.