BTF happens mostly to M&P 9C's. It certainly does not happen to all 9C's. And it only happens to ammo with a power factor of less than 130. Please let us know how your 9C shoots once you've taken it to the range.
My experience with M&P FS's is mainly weak ejection when using 115 gr and 124...
My M&P Pro has a 4.25" barrel so I don't know if the Wolff spring and guide rod will fit a 5" barrel. Do the two guns use the same length of recoil spring? What strength recoil spring did you order?
This would give you a power factor of about 130 (115 x 1130) at the point where your chrony is located. So your power factor would be greater at the muzzle.
My M&P 9c was giving me "brass to the face" with factory ammo that had a power factor of less than 130 at muzzle velocity.
There are many knowledgeable people in this forum but they haven't replied yet so here goes:
Reply to Question #1: You don't have to hold the slide stop down when the the magazine is loaded. The plastic follower in the magazine is what activates the slide stop when the magazine is empty...
I wish you luck in your endeavor. I had well over a thousand rounds in my FS before I put in the Apex Extractor. It improved the ejection but the brass still contacted my right shoulder. It wasn't until I installed a reduced power recoil spring that the brass ejected to my satisfaction.
I have long contended that the 16 lb recoil spring in the M&Ps is too strong for 9mm FMJ 115 gr and 124 gr ammo. It works well with 147 gr and +P ammo.
The Apex Tactical extractor is well designed and can only improve the quality of brass extraction and ejection.
Yes, my son and two sons-in-law have all shot it with identical results. I cured my M&P FS with a 14lb recoil spring and guide rod from Wolff. Unfortunately, I haven't found anyone who manufactures reduced force recoil springs for the M&P Compacts.
Your point is well taken, Ranger17. I know I'm but one of a few unlucky 9c owners. Here is a YouTube video of another unlucky guy: M&P9c ejection problems - YouTube
I meant weaker than a 9mm 124 gr through 40SW 180 gr of the same manufacturer's product line. As for getting hit by empty brass, I suppose I've been pretty lucky that my S&W SD, S&W Shield, Glock 19 and Sig Sauer P229 have never once thrown empty brass back at me. My S&W M&P 9c has never...
Actually a weaker spring is needed for the weaker ammo. The aftermarket recoil spring solution works for the FS M&P's but it is unavailable for the Compacts.
Almost everyone agrees that the M&P is a pretty good pistol. One of the most annoying problems that owners experience is brass ejecting straight back at them when shooting FMJ 9mm 115gr factory ammo. While many will say that this has never happened to them, some will agree that this is an...
These are my Ameriglo Night Sights. Get ready for some grief if you're installing the sights yourself. Those Shield factory sights are a bear to remove. I had to saw the sights off my Shield.
With my Shield, I can get two fingers on the grip using the short magazine and two and a half fingers using the long magazine. If the Compact were anything like that, I would be happy. The Compact's grip with the short magazine in place is about 1/8" shorter than the Shield's.
In answer to...