Ruger P90 Problem?

[bdg146]

Oh, and Daryl, where are you located? I may be interested in that P90 if you're serious about selling...

 

[rantingredneck]

The mags didn't change. I have no idea why wolff lists different springs for them. Mags for the P90, 97, and 345 are all interchangeable. I have had all three pistols and swapped mags between them regularly. Ruger lists a separate part number for the P345 magazine, but that is because it doesn't come with the orange sticker that says "may fire with magazine removed" due to the mag disconnect. Only difference.

I have the 16lb spring from Wolff for my P90. It is rather heavy. I used it for shooting heavy bullet reloads (260 gr SJHP's). I'd go with 13 or 14 if you just want a heavier spring ton dampen recoil. It will come with a correspondingly heavy firing pin spring. It is not hard to replace the firing pin spring too and it is recommended when going to a heavier recoil spring to prevent slamfiring. (though unlikely in any case).

 

[Daryl Licht]

I'm in Oklahoma. Every time I get the urge to sell it, I think of all the guns I've sold or traded away in the past, and just can't bring myself to do it.

I really hope you get this problem resolved. I sent you a PM.

 

[MCgunner]

Hmmmm... Maybe I found the answer to this problem...
The new mag I bought was for the P97, but I was under the impression that the mags didn't change. I checked out Wolff's website to look at the mag springs, and they list different springs for the P90 and the P97 mags. So, if Wolff recommends different springs, then maybe stock Ruger mag springs are different too. Maybe that's why my new magazine is malfunctioning. What do you think? Should I buy a P90 mag spring and put it in my P97 mag? The physical dimensions of the two mags are the same, so fixing the spring should fix the problem.

I'd put 10% over Wolff P90 springs in them.

Onto the recoil spring. I see the factory recoil spring is 11#. Wolff offers them in 12, 13, 14 and 16 pounds. What would you go for? How's 14 sound??

Heck, they're cheap, buy a 14 and a 16. The 16 works GREAT (and a 1911 spring at that) in my gun, but YMMV. The 16 could be a little stiff for soft ball or less than full power loads in the gun. My standard load is a cast Lee 200 grain SWC at standard ball pressure. 5.0 grains bullseye IIRC.

 

[rantingredneck]

Standard ball and my reloads cycled in the P90 with the 16lb spring. My biggest concern was that it tends to do HD duty and my wife could not rack the slide with that spring in. Standard factory, yes, 16lb wolff, no.

I also never really shot a lot of light loads with that spring so even though it cycled 50-100 of them, I couldn't say long term that I wouldn't have had an issue. Maybe, maybe not.

 

[bdg146]

I emailed Ruger this AM. We'll see what they say.

 

[bdg146]

Ruger's response:

Remove the follower from the mag and bend the upper shelf or top of the follower so the end is about 3/8" from the lower shelf. This will cure the problem.

My only question is where am I measuring? From the tip of the lower shelf to the tip of the upper shelf, or from the tip of the upper shelf straight to the lower shelf?

It seems sort of backwards to me that I would be bending the top shelf up. Seems like that would make the next round point up more, increasing the chance that the round will be caught and ejected from the extracted shell. Anyway, I followed their instructions and I guess I'll find out next time I shoot.

 

[bdg146]

Thought I'd update again...

I made the fix that Ruger suggested I make in their email. I finally had a chance to shoot again the other day. I ran 8 rounds through that magazine 3 times without a single failure, so it looks like bending the upper shelf up a little bit did the trick.

Before getting the reply from Ruger, I purchased a 14-lb recoil spring and a mag spring from Wolff. I do have a question about the recoil spring installation, but I think I'm going to start a new thread about that one. Thanks again for all the help!

 

[jlangton]

Ok-I've got a question now....would it be possible to convert a P90 to 10mm with a barrel change? If so, where to get a barrel for it in 10mm?
JL

 

[rantingredneck]

You can't.

If you go to Rugerforum.net and talk to a fellow named "coffeepot" he'll give you the lowdown on it as he worked for Ruger at the time the P90 was developed.

The original intent for the P90 may have been to go to 10mm as some here and at other forums have mentioned. "CoffeePot" has disputed that somewhat I think, in threads about this subject over there.

Even if the original intent was 10mm, the design parameters shifted to .45ACP which is an entirely different animal pressure wise and recoil impulse wise.

I've heard rumor that some P90 "prototypes" in 10mm are floating out there on the collectors market somewhere. Not sure if it's just rumor or not.

Bottom line is you can't convert a P90 to 10mm simply with a barrel change, even if you could find a 10mm barrel for it. Ruger certainly won't sell you one and the aftermarket barrel support for P90's just isn't there. The P90 would have to have other modifications beyond a simple barrel swap.

 

[jlangton]

That's kinda what I found by reading a bit more....too bad-I'd like to have a 10mm,but definitely no Glocks for me,and I'm not sure on the other brands that are available-haven't actually held any to see what I like/dislike about them.
JL