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 Post subject: pps 43 fired cases
PostPosted: Tue Aug 16, 2011 1:52 am 
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Mil-Surp Shooter
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I fired 50 shots of a buddies pistol/rifle pps 43 from CenterFire Systems.Good news is no jams and shoots just under 2" at 25 yards for 10 and under 4" at 50 yards.This is with Winchester Metric Check ammo.it has a nice trigger and appears to want to cluster its shots better than my targets show.

bad is the bolt is opening too soon and allowing the neck of the case to be blown out almost straight.Chamber cast shows chamber responsibly close to what is should be.

Is this a design an issue of mass being taken from an open bolt gun (changed to closed bolt) and not having enough mass to hold the pressure back properly?

George


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 Post subject: Re: pps 43 fired cases
PostPosted: Tue Aug 16, 2011 3:03 am 
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Wow, those are blown out! I think you have the problem pegged in my estimation.

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 Post subject: Re: pps 43 fired cases
PostPosted: Tue Aug 16, 2011 7:11 am 
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I also have a PPS-43 and I have never seen that problem. Is it an older weapon? Perhaps the main spring is weak?

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 Post subject: Re: pps 43 fired cases
PostPosted: Tue Aug 16, 2011 10:30 pm 
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jshicke wrote:
I also have a PPS-43 and I have never seen that problem. Is it an older weapon? Perhaps the main spring is weak?


brand new from centerfire systems

i will be giving them a call.


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 Post subject: Re: pps 43 fired cases
PostPosted: Mon Aug 29, 2011 10:10 am 
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I have a WLA PPSh-41, and it does something related - there's a bulge in the base of the spent shells. I've never really looked to see if there's a straightening of the bottleneck, but I imagine there would be. As far as I can tell, you've got it exactly right and the problem is the same with both. The bolt in mine has been lightened, and also it does not have any forward momentum at the moment of ignition, therefore it opens earlier and faster than in the original design. A stronger recoil spring might fix it. I've never bothered to fix that aspect of the PPSh, since it's never (to the best of my knowledge) caused a functional problem with the gun, and it's not like I was going to reload those shells anyway.

Doug

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 Post subject: Re: pps 43 fired cases
PostPosted: Mon Aug 29, 2011 11:31 pm 
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elsyr wrote:
I have a WLA PPSh-41, and it does something related - there's a bulge in the base of the spent shells. I've never really looked to see if there's a straightening of the bottleneck, but I imagine there would be. As far as I can tell, you've got it exactly right and the problem is the same with both. The bolt in mine has been lightened, and also it does not have any forward momentum at the moment of ignition, therefore it opens earlier and faster than in the original design. A stronger recoil spring might fix it. I've never bothered to fix that aspect of the PPSh, since it's never (to the best of my knowledge) caused a functional problem with the gun, and it's not like I was going to reload those shells anyway.

Doug


mine never malfunctioned either.I solved it by running a 115g cast bullet at 1200fps.Fired cases are normal and it shots well


George


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 Post subject: Re: pps 43 fired cases
PostPosted: Tue Aug 30, 2011 8:49 pm 
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damron g wrote:
jshicke wrote:
I also have a PPS-43 and I have never seen that problem. Is it an older weapon? Perhaps the main spring is weak?


brand new from centerfire systems

i will be giving them a call.



good Luck, They referred me to Royal Tiger when my front site broke (mine was a plastic peg). Three months later I am STILL waiting on the site. They don't even seem to answer my emails anymore. Going to threaten to return it if I don't hear back soon. Love the weapon, hate their service.

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 Post subject: Re: pps 43 fired cases
PostPosted: Wed Aug 31, 2011 8:24 pm 
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They are highly modified (almost bubbed) firearms.
They are converted from military slamfire sub guns.
As the military does not reload the only thing in mind in the orginial design was get the spent brass out, and nobody for the last 65 years ever cared what the brass looked like.
Only major changes in your weapon is from open to closed bolt.
You are lucky the brass looks that good.

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 Post subject: Re: pps 43 fired cases
PostPosted: Fri Sep 02, 2011 1:12 am 
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Mil-Surp Shooter
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Burner wrote:
They are highly modified (almost bubbed) firearms.
They are converted from military slamfire sub guns.
As the military does not reload the only thing in mind in the orginial design was get the spent brass out, and nobody for the last 65 years ever cared what the brass looked like.
Only major changes in your weapon is from open to closed bolt.
You are lucky the brass looks that good.



I have 300 down the pipe with the Lyman 3118 and 4g of Bullseye with no malfunctions and normal fired brass.With this low pressure load it works fine and it accurate enough i guess.What it is good for i cant say but i was curious how it would do with cast

here are typical 50 yard 10 shot groups with cast.(3-1/2")

George


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 Post subject: Re: pps 43 fired cases
PostPosted: Fri Sep 02, 2011 5:28 pm 
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my pps-43 blew up three times before I sent it back for the rifle version which blew up too.

bolt is too light.

I posted about it around 2.5 years ago.....

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 Post subject: Re: pps 43 fired cases
PostPosted: Fri Sep 02, 2011 5:35 pm 
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bounce19712 wrote:
my pps-43 blew up three times before I sent it back for the rifle version which blew up too.

bolt is too light.

I posted about it around 2.5 years ago.....



I figured that.The buffer after about 200 rnds of surplus was beat to death.I dont actually own the gun its borrowed from a buddy to work up some reloads.its a light laod cast bullet gun i guess.


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