This afternoon, I took my Neighbor and Daughter to the range. I also took the replacement Glock 30 and the gun that I'd purchased as Plan B, a Springfield XD Mod. 2 in .45 ACP. When I first got the word from Glock that they were going to warranty replace the G30, I felt a little foolish that I had jumped the gun with Plan B. After this afternoon, I don't feel so foolish.
I'm forced to the conclusion that there is something about the G30 Gen 4 that simply doesn't work with certain shooters. I find it difficult to believe that two guns produced at two widely different times would have the same malfunction. I also find it difficult to believe the gun is a "bad gun"; if it was the Intertubz would be lit up with that news, and it isn't. The gun may be stupidly ammo sensitive and it wouldn't be the first or the last. Whatever it is, I'm over it.
This particular example is both better and worse than its predecessor, if that can be said. Between myself and Neighbor, we managed 100+ rounds through it before calling it quits. With RWS Match ammo, it functions fairly well--I only took a single piece of brass, and that was off my right shoulder. Neighbor took none. The PMC Bronze was a disaster when I shot. Nearly every round resulted in the brass hitting me before it hits the ground. Neighbor did better with perhaps 3 in 10 impacting him.
We videoed this from the start, slow motion on an iPhone 7. For the life of me, I can't see anything other than my oddball shooting stance that could be an issue. I'm doing a good job of controlling the recoil, not limp-wristing and so on. But from some of the video, shot from dead behind, if I had my head in a "normal" position, I'd be complaining about the RWS Match ammo as well, as I would have caught a significant fraction of it in my face. I doubt I would have caught much less of the PMC in that position.
The video shows both types of ammo ejecting in roughly the same patterns. There appears to be a difference with the force of the ejection--the PMC seems to eject less forcefully. I noted a distinct difference in the sound of the report between the two, with the PMC being a much sharper crack than the RWS. These two observations made me wonder if the PMC was loaded significantly differently, but a quick Google search shows that the manufacturers are claiming a muzzle velocity of 850 fps for the PMC and 853 for the RWS. While I could chrono examples to be sure, I doubt the difference is going to be that drastically different, so that's probably a wild goose I don't care to chase. I could try other brands of ammo, but I've done that before and I don't think this will make any more difference now than it did then. If this ammo was a problem, it should have showed up earlier with other guns--I've nearly finished off the case of PMC and I'm halfway through the RWS, and most of it was shot in other guns.
The Springfield, on the other hand, digested both types of ammo and performed with the sort of competence that I've come to expect from their pistols. The gun just runs.
I have three other Glocks, a 19, 21, and 23, that I have zero issues with and that I plan on keeping. This one, unless I have some moment of epiphany in the very near future, is going to be on the "thinning the herd" list. I hate it, because it's a very likable gun, if you leave out the whole brass in the face thing. It shoots well, the recoil is easy to manage and the size is easy to conceal. But when you keep getting brass in the face, you develop ugly flinch, and that's not an advantage in self defense situation.
Sorry, G30, you're getting kicked to the curb. I hope your next owner has better luck with you.