I did some digging one time and I found out I believe the PM9 and PM45 use the same inner and outer springs in the recoil spring assembly. I believe the inner and outer were both 9 lb. springs.
I did some digging one time and I found out I believe the PM9 and PM45 use the same inner and outer springs in the recoil spring assembly. I believe the inner and outer were both 9 lb. springs.
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Years back I measured the individual spring weights of the p380, pm9 & pm45 and posted the results. I'm too lazy to look for my notes and back then there wasn't much interest.
YES, that's it. Great detective work. I got into a debate with Jocko about recoil springs more times than I want to admit. There are posts where I measured the p380 springs and mic the coil diameter. There is a post where I measured the inner spring on the two spring setup.
I remember the inner springs were the same.
Thanks Greg
Last edited by DJK11; 03-14-2020 at 04:24 AM.
So, following your thread, are you suggesting the 20.5lbs PM9/40 spring (SKU 52820)? It sounds like you stated that the OEM spring for the PM9 and PM45 were the same and lighter than the aforementioned spring. Any update on results with the PM45 and heavier spring?
Currently, I've been loading with Speer GD SB for the PM45, but I often prefer the +P loadings e.g. Rem GS 185gr +P when I can find them (often used in my CW45). I also shoot and sometimes carry WWB 230gr JHP. Fed HST sometimes makes it into the mix, too.
Any suggestions for the CW45 and TP45? Heck, while we're at it, any suggestions for the CW40 and T40?
A nine year old thread and things have changed. My pm45 at the time was the first iteration with the shorter slide. The outer recoil spring had 13 coils as did the pm9 at that time. Kahr lengthen the slides .125 as well as the recoil assembly. The outer spring then had 15 coils. My frame was getting beat to hell from the slide, hence I summarized a stronger spring was needed. While the stronger spring helped a lot, it wasn’t the total fix. Kahr CS machined the FRAME, then replaced, then modified again for the fix.
I haven’t purchased Wolff springs in a few years and at the time their pm9 springs had 13 coils. Not sure if they now have 15. A 13 coil spring would be too short for the current crop of pistols.
I hope my explanation is clear?
Last edited by DJK11; 03-16-2020 at 01:58 PM.