PCC and aluminum cased ammo
- Thread starter Dave_D
- Start date
Of course. RTFM !
No mention not to. (Online manual. Doubt I have it anymore)
Still curious on thoughts as even when I’ve bought ammo in the past counter guy asked if it was for a PCC and I was like “huh” and he mentioned it’s not good in a PCC
Dave
You have a box just try it.
If you are unsure if your gun is ok to run it just google the model name and see.
Or add what PCC it is and other's will tell you
I've ran thousands of this stuff through Glocks, M&Ps, PSAs, My PCC when ibahd them years ago. Never a single issue, no FTF, FTE, torn cases, stuck cases, jams or bullets getting pushed in. Not a single one in probably 4000+ rounds and counting
I am guessing some manufacturers don't recommend aluminum due to part of the case being unsupported (usually due to the feed ramp)
I also know from some cases I have picked up at matches that they have fired slightly out of battery and have sizeable bulges.
I will see if I can find a picture.
I also know from some cases I have picked up at matches that they have fired slightly out of battery and have sizeable bulges.
I will see if I can find a picture.
This is what I've always been told"
AI Overview
Using aluminum-cased ammunition in blowback-operated PCCs is generally not recommended because the open-bolt design of blowback firearms can lead to case rupture or failure if the case is extracted before chamber pressure has fallen sufficiently. While some blowback PCCs may function without issue, the inherent pressure dynamics of the design make aluminum-cased ammo riskier, as aluminum is a softer metal that is more prone to failure under high pressure than brass.
Why it's a risk
AI Overview
Using aluminum-cased ammunition in blowback-operated PCCs is generally not recommended because the open-bolt design of blowback firearms can lead to case rupture or failure if the case is extracted before chamber pressure has fallen sufficiently. While some blowback PCCs may function without issue, the inherent pressure dynamics of the design make aluminum-cased ammo riskier, as aluminum is a softer metal that is more prone to failure under high pressure than brass.
Why it's a risk
- Blowback Operation:
Blowback firearms do not have a locked breech to hold the case in the chamber. The bolt is held forward only by spring pressure.
- Case Rupture:
When fired, the initial pressure from the cartridge can push the bolt back, exposing the case before pressure has completely dissipated.
- Aluminum Weakness:
Because aluminum is softer than brass or steel, it has a lower structural integrity. This makes it more likely to split, rupture, or have the case head ripped off by the extractor under high pressure.
- Damage to the Gun:
A ruptured case in the chamber can damage your firearm's components and potentially cause injury to the shooter.
Greenhorse six
CGN Ultra frequent flyer
The only mention I've seen about not us aluminum cased ammo in a PCC was for the .40S&W chambered ones .
And that was because of the high pressure of the. 40cal. tended to rip the bases off during extraction.
And that was because of the high pressure of the. 40cal. tended to rip the bases off during extraction.
Here’s an interesting read from blowback9.com in regards to 9mm blow back pccs.
blowback9.wordpress.com/2021/09/06/aluminum-case-ammo-can-i-use-it-in-my-blowback-9mm/
He lists the following symptoms for aluminum ammo if there is premature extraction because there’s not enough combined mass between the bolt and buffer to keep the breech closed long enough for the pressure to drop
What are the symptoms that may happen?
Torn rims
Case bulge
Case split
Case blowout/venting
Case burst
These are typical blowback gun “premature extraction” symptoms. This happens when there is too little reciprocating mass, and the bolt is moving rearward too fast.
Under the right conditions, these symptoms could also be experienced with brass or steel cased ammo. However, with aluminum cased ammo, this is usually happening at bolt weights and bolt velocities that work fine with brass or steel cased ammo.
I do know that some manufacturers explicitly state not to use aluminum ammo.
From freedom ordnances website for example
9mm 115 gr. FMJ recommended/select hollow points. We recommend starting with with the following ammunition: 115 gr. FMJ Tulammo®, 115 gr. FMJ MAGTECH®, 115 gr. FMJ Wolf®, 124 gr. JHP SIG SAUER® Elite Performance, PMC® Bronze, 115 gr. American Eagle®, 115 gr. Federal®, 115 gr. Remington®. The FX-9 upholds Xtreme reliability with a wide range of ammo including many hollow point designs for self defense and full metal jacket. We do not recommend the use of non jacketed ammunition as unprotected lead can cause fouling and buildups that plated and jacketed bullets do not. Do not use aluminum case ammunition or the brand Zinc Point ammunition, it may cause damage to your FX-9 and void your warranty!
blowback9.wordpress.com/2021/09/06/aluminum-case-ammo-can-i-use-it-in-my-blowback-9mm/
He lists the following symptoms for aluminum ammo if there is premature extraction because there’s not enough combined mass between the bolt and buffer to keep the breech closed long enough for the pressure to drop
What are the symptoms that may happen?
Torn rims
Case bulge
Case split
Case blowout/venting
Case burst
These are typical blowback gun “premature extraction” symptoms. This happens when there is too little reciprocating mass, and the bolt is moving rearward too fast.
Under the right conditions, these symptoms could also be experienced with brass or steel cased ammo. However, with aluminum cased ammo, this is usually happening at bolt weights and bolt velocities that work fine with brass or steel cased ammo.
I do know that some manufacturers explicitly state not to use aluminum ammo.
From freedom ordnances website for example
9mm 115 gr. FMJ recommended/select hollow points. We recommend starting with with the following ammunition: 115 gr. FMJ Tulammo®, 115 gr. FMJ MAGTECH®, 115 gr. FMJ Wolf®, 124 gr. JHP SIG SAUER® Elite Performance, PMC® Bronze, 115 gr. American Eagle®, 115 gr. Federal®, 115 gr. Remington®. The FX-9 upholds Xtreme reliability with a wide range of ammo including many hollow point designs for self defense and full metal jacket. We do not recommend the use of non jacketed ammunition as unprotected lead can cause fouling and buildups that plated and jacketed bullets do not. Do not use aluminum case ammunition or the brand Zinc Point ammunition, it may cause damage to your FX-9 and void your warranty!
