1 - I’ve never shot +P out of any suppressor before. Even in subsonic loads, are they louder than normal stuff?
2- Do they provide significant barrier penetration?
3 - Do any of them have over penetration issues?
4 - Is it worth the extra money, and parts wear?
5 - Would they wear out a suppressor more/faster?
Thanks for the feedback. Hope I didn’t ask to many questions.
I have never shot +P out of a suppressor, only 147gr non +P, so I don’t know about that. Unsuppressed, +P is a bit louder, but the suppressor may not play by those rules.
2- Do they provide significant barrier penetration?
I need more info… What barrier? Autoglass? Walls? Car door? Children and pets?
Also, what bullet type? A +P load using a shitty bullet isn’t going to penetrate as much as a good non +P load.
However, when comparing equals, it sometimes adds barrier penetration (I have personally tested Remington Golden Saber +P and non +P and observed superior barrier penetration with the +P), and sometimes actually reduces penetration (some hollow points open up sooner at higher velocities, resulting in more rapid slowing of the projectile, which of course reduces penetration). This depends both on the bullet and the barrier in question.
With so many variables, if you really want an answer you can trust, I advise testing it yourself. It isn’t that hard.
3 - Do any of them have over penetration issues?
Depends on a lot of things. Obviously, it can cause situations where the projectile penetrated more than it otherwise would have.
4 - Is it worth the extra money, and parts wear?
Meh… Good shot placement has been killing people dead for a long time. I wouldn’t feel defenseless if you took my +P carry ammo away. That said, I prefer +P for most of my carry loads, and am willing to spend the money on it and some training ammo loaded to those pressures on a regular basis.
As for parts wear… Glocks don’t seem to give a damn. Neither do my 1911s except that they do wear through springs faster when fed a regular diet of +P (then again those things eat through springs like Chinese fast food anyway).
5 - Would they wear out a suppressor more/faster?
Probably… Or at least get it dirty faster. Write the folks that made your suppressor and ask them what they think, they should know.
Since you can probably replace your baffles, you may spend several times as much money on the ammo needed to burn them out as you will on replacing them… And I doubt +P will wear the can itself out any faster… Hell, the can will probably outlive you if it’s well made and you don’t piss off any freight trains.
Thanks for the feedback. Hope I didn’t ask to many questions.
Ask more, I wouldn’t be surfing the internet if I had something better to do. 
I don’t know enough to do more than speculate on the other questions, but I have to ask - does subsonic 9x19 +P exist?
I believe most of your +P ammo in 9mm is designed for those barrels around the 3-3.25" mark. For instance—Speer Gold Dot 124gr +P 9mm is over 1200fps and 1350fps in a 16" barreled carbine where a 147gr non-supercharged variety is 1100fps ± and the 147 penetrates better. It’s not the speed at which it’s launched being the sole factor in penetration. I think I saw a youtube video of a guy shooting a G19 into 4 water/newspaper filled jugs and the 124gr +P penetrated slightly less than the 147gr did. He was using Speer Gold Dot ammo.
Not that I know of… But you don’t have to use subsonic ammo in a suppressor (people get kinda caught up on that). With most suppressors and guns, supersonic ammo is fine. It will create a larger noise signature, but that’s an often exaggerated issue.
If you’re trying to be James Bond or Secret Squirrel Sniper, go the subsonic route. But shooting supersonic ammo with a can is still much quieter than unsuppressed fire. It is great fun and suppressed M4s firing triple-mach ammo are often used in combat, as it eliminates flash, greatly reduces dust signature, greatly reduces noise signature and makes it extremely hard to figure out where the shooter is.
Furthermore, while this is nothing more than complete speculation on my part, I do know that Glock’s with a good size can on them can be picky about short-cycles… +P ammo might actually help with that… Maybe.
Thanks for the feedback.
For barriers I was talking about walls, cars, brick, etc.
For over penetration I was referring to if I made my carry ammunition (without the suppressor, obviously) and had to engage a bad-guy would I be endangering those around me?
Would the reduced penetration in some JHP loads lead to increased terminal ballistics?
All the +P ammo I had, I didn’t think to shoot them with a suppressor.
And I typically only shoot subsonics out of my new Ti-Rant. I don’t like shooting regular ammo out of it.
If I’m going through the trouble of getting a suppressor, setting up my gun for one, etc. I’m going ALL THE WAY as far as noise reduction.
I’m thinking of using it as my primary carry ammo in my G19. But my G17 is a suppressor host, so I was wondering how that would perform too.
You’re asking questions that don’t have much to do with each other. A subsonic round will be quieter out of a suppressed weapon because of the lack of supersonic flight noise (“ballistic crack”). Supersonic flight noise is largely a product of bullet diameter, not its velocity. This is one (but by no means only) reason it’s common to shoot supersonic 5.56 through a suppressor, and not so common to shoot supersonic 9mm through a suppressor. Muzzle signature aside, the flight noise from the 9mm is actually louder than 5.56 flight noise.
+P subsonic ammo does indeed exist, even if it’s not generally known as such. Any of the very heavy subsonic loads (like the 158gr FMJ subsonic) are standard pressure or hotter, they are NOT reduced pressure.
None of this has anything to do with appropriate carry loads. Appropriate load selection for a suppressed weapon is a totally different question, and it would be advisable to select your carry load based on its own merits, not how it functions through a suppressor.
I would just recommend you chose a 147gr load on the list.
+P ammo is more of a gimmick to me, with modern bullets designed to properly expand at normal velocity.
I’m asking these questions, because I want to be using one, or two types of ammunition. And I want to know the effects of running it through my G17, as well as G19. As I want to make sure it functions well in both platforms.
I’ll probably stick with my Winchester PDX1.