P90 Shakedown

[Biggfoot44]

I took out my new to me P90 ( stainless , DC , 1992 mfg) for it's initial shakedown/ reliability test.

Over the course of aprox 250 rds , had a cpl issues:

With RP 230 fmj had two incomplete battery , tapped back of slide and fully chambered. Again one more time with fmj round escapes my memory.

One round of TULA had visably semi-light strike , fired on second attempt. It's tempting to blame the ammo , but in light of the above , I have to scrath my head if it might have been just a slightest bit not fully in battery , and part of hammer energy pushed it rest of the way.

With WWB 230 JHP , when feeding top round by releasing the slide stop , the round went stright into feed ramp and everything stopped there. Did it with 8rds in mag , and 7 , and 6 . I then slingshot the slide , and it feed. NO it is not acceptable to me to just slingshot instead of releasing. I have nearly 30yrs of muscle memory of hitting slide stops ( yes my thumb is long enough to reach , yes I do it subconscously ) . And besides it works with three fmj rns , and a flat nose. The JHPs feed and cycled fine while actually shooting.

When I was giving it a casual clean and lube (RemOil happened to first at hand) , I noticed the recoil spring looked a bit "well broken in ", but went ahead with it for initial session.

I have put in an order to Midway for Wolfe springs in 11lb and 13lb.

I also ordered two factory 8rd mags. (Only came to me w/ one fact 8rd mag.

Is there anything else P90 specific I'm overlooking?

I read that early P90s had 7rd mags , and that 8rds came later. In 1911s I despise 8rd mags , and will only use 7 rds. Should I hunt out Ruger 7rd mags / followers ?

 

[welder]

While you await the springs, order some 7rd followers, the polymer ones that are for the seven rounders. The factory metal follower that comes with the 8 rounder from Ruger tends to damage the feed ramp over time. Luckily P90, (a member here), explained how it happens in a thread once. Seems on the last round the follower is pulled forward by the cartridge and rebounds off the ramp. There are some pictures of the damage here somewhere. The 7 rounder can't do that, as it can't be pulled partially out of the mag. I replaced my 8 round mag followers as soon as I got my P90 and never looked back.

BTW I think you are dead on about the hammer pushing it into battery and then dimpling the primer. A fresh recoil spring should solve your problems.
BTW, welcome to the forum!

 

[Biggfoot44]

That's what I'm hoping. Midway shows my springs as having been shipped. I doubt they actually get mail pickup late on Sat night , so probably waiting for the little white truck for Mon morning.

What are good source(s) for the retro 7 rd followers ?

 

[Biggfoot44]

Duplicate

 

[welder]

I got mine at Midway. I have been told that the Wilson will fit too but I have not actually tried those. Maybe P90 will come buy with confirmation on the Wilsons. Good luck.

 

[P90]

I also got my follower kits from Midway. The Wilson should work if they have the shorter spring. The plastic followers use a shorter spring than the metal 8 round followers. The metal followers would be fine, if it wasn't for the frame gouging on the last shot, when the follower hits the frame. It doesn't seem to be as bad on steel 1911's as on the aluminum frames. They started putting a steel strike plate on the plastic frames to eliminate the gouging.

 

[welder]

Thanks P90.

 

[Biggfoot44]

Ah Ha !
I get it finally , P90 followers interchange with 1911 followers.