The Unofficial P64 Resource Forum

Before you go on a tear, just try one change at a time so you'll get a better idea what the problem is/was. Might just be one simple thing and you need go no further. But you knew that .... I think, IMO, the ammo and lube are good choices. Just FYI, all my P64's run an18# hammer spring and 20# recoil spring. The original weight 18# recoil spring caused intermittent failure to return to battery. That extra 2# of the 20# spring fixed it. Now all 5 of my P64's are problem free.

Weasel640 wrote:

LovingSensei wrote:The round just doesn't seem to be pushed in all the way.

Are they the older mags or new mags? It will still be important to note what mag is giving you the issue, or if it is both.

LovingSensei wrote:Yeah that may be it. I'm gonna test with only 5 rounds in each mag and see if that solves the issue. If it does. I will definitely clean the mags and try six again. I just ordered two keep shooting mags. I hope I didn't waste my money!

They will most likely wear out fairly quickly. The early Keep Shooting Mags were garbage. The more recent one have gotten mixed reviews and seem to me the luck of the draw. Figure out your issue before using them or you may have more issues from them.

Oh and you know you can quote multiple people in one reply?

Hahaha sorry I'm using my phone. And they just came with the gun. I don't know exactly how old they are. My gun again is from 1974. Next time I go to the range I will try shooting one mag with five rounds and another with six. Several times. I will make sure the gun is lubed properly, I will be using S&B ammo instead of Red army standard, and I will try the 20 lb recoil spring. I will let you guys know how it goes. I'm hoping the gun just needs to be shot a bit or the magazines need to be cleaned. Or that it just needs some better ammo. The red army stuff was kind of rough looking even though it was brass.

robhic wrote:Before you go on a tear, just try one change at a time so you'll get a better idea what the problem is/was. Might just be one simple thing and you need go no further. But you knew that .... I think, IMO, the ammo and lube are good choices. Just FYI, all my P64's run an18# hammer spring and 20# recoil spring. The original weight 18# recoil spring caused intermittent failure to return to battery. That extra 2# of the 20# spring fixed it. Now all 5 of my P64's are problem free.

I will definitely try that! After I fix the issue I wil also be replacing that blasted stiff hammer spring! XD

i found that a new magazine spring solved my problem with failure to feed

xskinman wrote:i found that a new magazine spring solved my problem with failure to feed

Yeah I notice that most of the time when these guns don't work properly it's because of cosmoline build up, or some issue with magazines.

xskinman wrote:i found that a new magazine spring solved my problem with failure to feed

Could you start another thread detailing what you did for the new Magazine spring? The question often comes up but no one seems to have recent documentation of how to do it. Thanks.

Weasel640 wrote:

xskinman wrote:i found that a new magazine spring solved my problem with failure to feed

Could you start another thread detailing what you did for the new Magazine spring? The question often comes up but no one seems to have recent documentation of how to do it. Thanks.

Heck yes I wanna know too.

Weasel640 wrote:

xskinman wrote:i found that a new magazine spring solved my problem with failure to feed

Could you start another thread detailing what you did for the new Magazine spring? The question often comes up but no one seems to have recent documentation of how to do it. Thanks.

And while you're at it, tell us WHERE you got the "new" magazine spring. Is it a P64 spring new to you from another magazine, another brand spring re-purposed for use in a P64 mag or what? No one has found a source for a real P64 replacement mag-spring! Sorta like a unicorn!!!

It's your recoil spring, mine did the same thing when I switched to the wolff 22lb spring, I switched it back to stock and haven't had any issues since

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gradles21 wrote:It's your recoil spring, mine did the same thing when I switched to the wolff 22lb spring, I switched it back to stock and haven't had any issues since

Did you grind the ends flat on the 22lb spring? Or just put it in?

gradles21 wrote:It's your recoil spring, mine did the same thing when I switched to the wolff 22lb spring, I switched it back to stock and haven't had any issues since

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I will try the 20 lb!

Weasel640 wrote:

gradles21 wrote:It's your recoil spring, mine did the same thing when I switched to the wolff 22lb spring, I switched it back to stock and haven't had any issues since

Did you grind the ends flat on the 22lb spring? Or just put it in?

My 22 pound actually had its ends grounded flat by the gunsmith so that definitely could not be the issue with mine.

As you may know there are at least two variations of the P-64s. Generally the early version has a round hammer and the late version has a pointed or spurred hammer. There is a difference in the magazines as well. The late variation has slightly longer feed lips. If you hold a early and late mags side by side you can see the difference. I have one of each a 1969 early and a 1976 late. When I got the 1969 it would jam up with one of the mags but worked fine with the other. I found that the mag it jammed with had longer feed lips. My 1976 mags both had long lips and they worked fine in the 1976 pistol. I took the mag that did not work well in the 1969 and carefully shortened the feed lips to the same length as the mag that worked well. Now both mags work just fine. I put the serial number of the pistol on the mags so I would not mix the early and late mags with the early and late pistols. This may not be your problem but could be worth looking at.

Weasel640 wrote:

gradles21 wrote:It's your recoil spring, mine did the same thing when I switched to the wolff 22lb spring, I switched it back to stock and haven't had any issues since

Did you grind the ends flat on the 22lb spring? Or just put it in?

I know I'm late to this party but I'm having the same issue. Could you please describe the process of "grinding the ends flat" on the recoil spring and what the significance of this would be? I had put the Wolff 22lb recoil spring in and now I've switched back to the original but having the same issue. I'm going to try only loading with 5 rounds. I've cleaned the mags. -- Thanks

Review this topic for spring grinding.

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