FNP 45 Mag Issues?
I have had my FNP 45 for a year now. I have between 1,500 and 2,000 rounds through it. I have 5 mags, 3 x 15 round mags and 2 x 14 round mags, all factory FN mags of course. I've put the gun through a couple of short pistol course (2 hour evening courses at Tiger Valley, 200 rounds each).
The last pistol course I had was in June and the gun had one FTF which was resolved by simply "racking the slide". Last weekend I took it to the range and put 150 rounds through it. I had three more FTFs. Last night I gave the pistol a really detailed cleaning and cleaned the mags as well. Took it to the range today and after about 75 rounds I started having all sorts of problems, all FTFs. The first few were just issues where "racking the slide" caused the round to chamber, but then it started getting worse. A couple rounds into each mag, the round would catch on the top of the mag and not hit the feed ramp. I was forced to engage the slide stop and drop the mag. This problem was occurring on all 5 of my mags.
After I discovered that the problem was universal to my mags, I started trying to diagnose it. It seems like a problem with either the follower or a lower round in the mag getting wedged into the mag and not wanting to move. With three rounds in the mag, I can very easily get the bottom two rounds to stick and the top round will jiggle freely between the feed lips. I can can shake the top two rounds out with the third round being stuck. I actually sometimes takes some significant pounding to get that round free.
Things that I have verified:
1. I reassembled the mags correctly after cleaning them. The top of the mag spring is painted yellow to indicate which way is up and it is significantly narrower than the bottom.
2. The mags are not dirty, and the condition of the parts is good. I see some minor spots on the followers where they may have rubbed against the inside of the mag well, or may have rubbed against the slide stop or some other part on the gun. But that is all. There are no noticeable deformities on any of the parts and there are no burrs or chips. There is no corrosion on any of the mag springs or the mag body. The floor plates are all solid and showing no signs of wear.
3. It does seem that the worst of the problems occurred with Winchester White Box ammo. All of the ammo through this gun has been ball ammo. This gun has never fired a hollow point. I usually shoot Remington UMC ammo in the yellow or Green and White boxes and I only have the occasional FTF. With the WWB (two different kinds, USA45AVP and Q4170) I had the worst of the problems.
The ammo possibility just occurred to me as I was typing this. Let me know what you think or if you know of any issues with FNP45 mags or FNP45s in general. I really want this to be an ammo problem rather than a gun problem. But if it's an ammo problem then I really hope it feeds OK in my 1911, because I've still got 450 rounds of this shit.
Bob Ailes wnated me to send in all my mags for replacement, as after about 100 rounds I get the same thing...but mostly with hollow points. I never did send my mags in because they never sent me the return label.
Bob told me they originally thought the problem to be WWB ammo, but it was actually out-of-spec magazines.
Had the same problem with the "tactical" and its 15 round mags.
It pretty much is WWB.
I shoot 230 grain Aguila, RWS, Wolf, Blazer, Federal and my own reloads in .45 ACP (and Taurus-loaded 185 grain Barnes DPX ammo). My FNP-45 Tactical eats all of them.
I have the three 15-round FDE-base magazines that came with my Tactical and another 6 black-base 15-round FNP-45 magazines.
I have not had any problems with WWB, just hollow points, and only after a couple hundred rounds.
I had problems with my 45 ball handloads in a FNP45TAC. Determined that OAL was too long. Adjusted my seating die to seat bullets a few thousandths deeper. Have had no issues since. My 45 Jhp handloads always functioned 100%.
That was the issue with WWB - OAL being too long. The FNP-45 magazine was designed for SAAMI-spec OAL length .45 ACP. Some pistol magazine designs are more generous in their parameters.