I picked up a Gen 4 G19 in June to be a backup / spare to my primary carry Gen 4 G19. I've had no issues with the first pistol. The new pistol, from the very first rounds fired, would BTF me 3-4 times a mag. Extraction was all over the map; face, to my left, over my head, 3-4 o'clock, had one that kinda rolled out ended up perfectly upright on the slide just behind the barrel. This was with WWB and Tula ammo for the most part; +p Gold Dots worked OK. I was NOT pleased.
Yesterday, I installed an HRED and an Apex Gen 3 extractor. Ran up to a local redneck range (there are advantages to living in coal country....plenty of places to shoot, and noone thinks anything of it) and shot 3 mags of WWB and a 50 round box of Tula. Zero BTF and everything ejected into a loose circle a few feet away at my 4-ish o'clock.
It is frustrating to have to drop after market parts into a brand new gun to keep brass off of your grill.
So, I've had the most curious experience with my oldest 2 glocks; a 19 and a 17RTF, both 3rd gens made in 2007 (MGX) and 2009 respectively. Both have been recently retired-ish from active working use as I picked up 4th gen replacements for each that I find I shoot a little better. Both guns began to gave me noticeable brass to face issues that I first noticed around spring of 2015, when the 19 was at approximately 8000 rounds and the 17 was at about 7000.
Recently, at round counts 8800 and 7600 for the 19 and 17 respectively, I replaced their existing extractor depressor plunger units with White Sound HREDs, hoping this would solve the problem. In the 19 it has, if anything, made things worse; now brass comes back at my face with very respectable velocities that make me very flinchy when shooting the gun. Today, in trying out the 17, the HRED completely reversed the problem; put all my brass in a neat little pile at my ~3:30.
Very weird that 2 guns of the "good" era vintage with the same problem an similar roundcounts would respond so differently to the HRED. Have a new ejector coming for the 19; we'll see if it changes anything.
For what it's worth, installing the 30274 ejector in the above-mentioned Gen 3 Glock 19 has totally resolved my issues. 190 rounds down the pipe today (150rds 115gr Silver Bear, 40rds 147gr Winchester Ranger T), none hit my forehead and the majority ejected in a neat little pile about 5' to my right at roughly my 3 o'clock.
And the BTF problem re-emerged in my G17 in the last steel match I went to, and a few even happened in my G34.
I guess it's just me, even though I've never had this problem in CZ's, Walther's, HK's. I'm tiring of it.
When you have to shoot, shoot, don't talk. -Tuco
Today is victory over yourself of yesterday... -Miyamoto Musashi