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#143318 - 04/14/19 10:23 AM P7M8 life expendency
rmc Offline
Recruit

Registered: 07/21/00
Posts: 13
SAMMI pressure rounds only. No +P or +P+.

In your experience what is the round count life expectancy of a P7M8 (that will be fired no more than 200 rounds per range session) BEFORE a part failure that would put the gun out of action?

What part or parts are most likely to fail?

I am not counting extractors since the gun has a fluted chamber or replacing recoil springs.

Also, normal cleaning/lubrication after each range session would occur.
rmc

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#143319 - 04/17/19 08:35 AM Re: P7M8 life expendency [Re: rmc]
SAWBONES Offline
Operator

Registered: 02/13/00
Posts: 2044
Loc: The third dimension
Hello rmc;


"IME"...indefinite life expectancy.

My original, now 34 year old P7M8, purchased NIB, which has fired uncounted tens of thousands of factory FMJ and JHP rounds (no reloads), including +P and +P+, has never had any malfunction of any kind, nor had any parts either break or wear sufficiently to require replacement.

It's admittedly been cared for assiduously, with cleaning and inspection (including particular attention to the gas piston and gas piston chamber) after each firing session, but never "babied".

After about 15 years, I did start to replace the recoil spring and the magazine springs every few years, "just because".

I've heard, second hand, of the firing pin bushing breaking, but never actually seen it occur.
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#143320 - 04/17/19 09:44 AM Re: P7M8 life expendency [Re: rmc]
rmc Offline
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Registered: 07/21/00
Posts: 13
Thanks Sawbones
That's exactly the kind of feedback usage I was looking for.
rmc

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#143321 - 04/20/19 12:49 PM Re: P7M8 life expendency [Re: rmc]
5wire Offline
Plinker

Registered: 12/28/02
Posts: 408
Loc: Portsmouth NH
My firing pin bushing broke after 10K or so rounds.



Fixed under warranty.
_________________________
Bob

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#143322 - 04/21/19 10:45 AM Re: P7M8 life expendency [Re: rmc]
rmc Offline
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Registered: 07/21/00
Posts: 13
I've read that a PSP firing pin bushing can be used in a P7M8 but not the other way around.

ANYBODY know if this is accurate?
rmc


Edited by rmc (04/21/19 11:35 AM)

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#143323 - 04/22/19 02:36 AM Re: P7M8 life expendency [Re: rmc]
5wire Offline
Plinker

Registered: 12/28/02
Posts: 408
Loc: Portsmouth NH
They fit the other way around and don't need the tool to remove or install. Never tried shooting the P7 that way but it was tempting.
_________________________
Bob

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#143324 - 04/22/19 12:50 PM Re: P7M8 life expendency [Re: 5wire]
rmc Offline
Recruit

Registered: 07/21/00
Posts: 13
So the P7M8 firing pin bushing WILL WORK in a PSP.

The PSP firing pin bushing WILL NOT work in a P7M8.

Right?

rmc

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#143325 - 04/22/19 11:18 PM Re: P7M8 life expendency [Re: rmc]
5wire Offline
Plinker

Registered: 12/28/02
Posts: 408
Loc: Portsmouth NH
It will fit. I don't know if it will work.
_________________________
Bob

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#143327 - 04/27/19 08:18 PM Re: P7M8 life expendency [Re: 5wire]
raydoctor Offline
Sharp Shooter

Registered: 09/12/05
Posts: 592
Loc: KCMO
A P7 FPB will fit in the M series pistols and work all day long......I actually prefer them to the more protruding FPBs of the M series pistols.


Edited by raydoctor (04/27/19 08:20 PM)

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#143328 - 04/27/19 08:25 PM Re: P7M8 life expendency [Re: raydoctor]
raydoctor Offline
Sharp Shooter

Registered: 09/12/05
Posts: 592
Loc: KCMO
Here's a quick list of the parts I've had fail over the years.....

2 Disconnects

3 Transmissions

4 Sear bars

4 Firing pin return springs

5 Firing Pin bushings

~10 Drop safety springs

1 retired mag body where the lug at the anterior/superior margin sheared off (these M13 mags are made of voodoo. I can't believe the punishment they take!)

Fractured weld of posterior plate of the slide (waiting in Bruce Gray's queue for a potential fix)

5 Drop safety broken

Trijicon front sight blade (sheared off of while attempting to fix a stoppage...oops!)

Had one of my shooter M13s re-barreled by HK as the gas port was eroded to the point of fouling prematurely (not really a failure, just worn out)

(I'm sure there are many posts in the archives of PCT on parts breakage....I started a somewhat recent post regarding parts breakage on the "other" HK site but the topic has been mulled over multiple times past and I got the feeling interest was waning as I'm not sure many people out there still run these guns hard)


Edited by raydoctor (04/27/19 08:44 PM)

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#143329 - 04/29/19 08:17 AM Re: P7M8 life expendency [Re: raydoctor]
rmc Offline
Recruit

Registered: 07/21/00
Posts: 13
Thank you very much raydoctor. That is very helpful information.
rmc

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