2000Z-71
Member
Update 4:
IT WORKS!
Last time out before today, loaded 5 rounds in the magazine, did its usual hiccup on the second to last round in the mag and jammed the nose of the bullet up into the barrel hood. I cleared it and threw it back in the range bag in disgust.
Today went out with a co-worker who has own YouTube Channel, Chuke's Outdoor Adventures. He has a 4.6" M&P 10mm that has been problem free so we set out to make a video comparing the two. Three different shooters put 400 rounds of 7 different types of ammo through the gun today and not a single hiccup. I'll post a link once he finishes editing and posts the video.
Nothing changed today since I last shot it. To date; back to Smith & Wesson once to have the barrel replaced, replaced the magazine springs with Wolff Extra Power springs from the M&P .45, Galloway Precision 22LB. recoil spring assembly, and polishing of the feed ramp and chamber by me.
It works! I'm happy, I've really wanted to like this gun, 15 rounds of 10mm in a Commander sized package but felt I just couldn't trust it. We shot everything from .40 S&W power level stuff to Underwood 200gr. hard cast, even mixing 3 different types of ammo in the same mag and it performed.
Also shot Chuke's Sig XTen, Springfield XDM 10mm and Gen 5 Glock G20. I was impressed with the XTen but was almost afraid to shoot, afraid that I would have buyer's remorse over my Smith & Wesson. In the end not having buyer's remorse. While similar in size, the Smith does feel lighter and more svelte for a carry gun of the XTen.
So in short if you're considering a 4" M&P 10mm, expect to swap recoil springs, mag springs, do some home gunsmithing and a few hundred round break in period.
Update 3:
Installed 22lb. recoil spring assembly from Galloway. No difference at all. Still consistently jambs the second to last round from the magazine no matter what the ammo.
Wondering what to do at this point. I'm going to try and run the standard magazine spring with the 22lb. recoil spring and see if that does anything. I'm also going to look at it tomorrow under better lighting and see if polishing the feed ramp or the underside of the barrel hood might do anything.
Update 2:
Extra power magazine springs had no effect whatsoever, it still consistently jambs the second to last round in the magazine no matter the ammo or how many rounds are loaded in the magazine. 22lb. recoil spring assembly ordered from Galloway Precision for the next attempted fix...
Update:
Returned from factory, no explanation, invoice states, "Replaced barrel, test fired for function"
Range trip tonight, point of impact now matches point of aim. The pistol still consistently fails to feed on the second to last round from the magazine. Does not matter how many rounds are loaded in the magazine, does not matter which magazine, and does not matter which type of ammo, it jambs the nose of the bullet up against the underside of the barrel hood with the base of the case still in the magazine. Dropping the magazine allows the slide to move forward and chamber the round.
Ammo fired tonight was;
Underwood 200gr. Flat Nose Hi-Tek Coated Hard Cast
Ammo Incorporated 180gr. Flat Nose
Federal American Eagle 180gr FMJ
At this point I'm kind of at a loss of what to do. I may try sending it back to Smith for a second time or I may try respringing it. Galloway Precision now offers recoil spring assemblies for the 4" M&P 10mm, Wolff offers extra power magazine springs for the .45ACP magazines that work in the 10mm.
Original post:
So made it out to the range tonight withy new 4" M&P 10mm and it was not a happy range trip. Gun was cleaned and lubed prior to shooting. Ammo used was Underwood 180gr. FMJ flat nose, 200gr lead flat nose and 220gr. lead flat nose.
The good:
Very soft shooting for a 10mm.
Practical size; small enough to conceal and big enough to be comfortable to shoot.
Runs flawlessly until the second to last round in the magazine.
The bad:
Consistently low point of impact with all types of ammo.
Consistent failure to feed on the second to last round in the magazine. Does not matter how many rounds are loaded; 5, 10, 15 it always chokes.
50% failure to feed on the last round in the magazine after the second to last round is chambered and fired. The jam on the last round is a little unique, a live round sticking out of the ejection port straight vertically.
I'll be contacting Smith & Wesson's customer service. I really want to like this gun and be able to carry it. But as it stands right now it's not usable or reliable.
IT WORKS!
Last time out before today, loaded 5 rounds in the magazine, did its usual hiccup on the second to last round in the mag and jammed the nose of the bullet up into the barrel hood. I cleared it and threw it back in the range bag in disgust.
Today went out with a co-worker who has own YouTube Channel, Chuke's Outdoor Adventures. He has a 4.6" M&P 10mm that has been problem free so we set out to make a video comparing the two. Three different shooters put 400 rounds of 7 different types of ammo through the gun today and not a single hiccup. I'll post a link once he finishes editing and posts the video.
Nothing changed today since I last shot it. To date; back to Smith & Wesson once to have the barrel replaced, replaced the magazine springs with Wolff Extra Power springs from the M&P .45, Galloway Precision 22LB. recoil spring assembly, and polishing of the feed ramp and chamber by me.
It works! I'm happy, I've really wanted to like this gun, 15 rounds of 10mm in a Commander sized package but felt I just couldn't trust it. We shot everything from .40 S&W power level stuff to Underwood 200gr. hard cast, even mixing 3 different types of ammo in the same mag and it performed.
Also shot Chuke's Sig XTen, Springfield XDM 10mm and Gen 5 Glock G20. I was impressed with the XTen but was almost afraid to shoot, afraid that I would have buyer's remorse over my Smith & Wesson. In the end not having buyer's remorse. While similar in size, the Smith does feel lighter and more svelte for a carry gun of the XTen.
So in short if you're considering a 4" M&P 10mm, expect to swap recoil springs, mag springs, do some home gunsmithing and a few hundred round break in period.
Update 3:
Installed 22lb. recoil spring assembly from Galloway. No difference at all. Still consistently jambs the second to last round from the magazine no matter what the ammo.
Wondering what to do at this point. I'm going to try and run the standard magazine spring with the 22lb. recoil spring and see if that does anything. I'm also going to look at it tomorrow under better lighting and see if polishing the feed ramp or the underside of the barrel hood might do anything.
Update 2:
Extra power magazine springs had no effect whatsoever, it still consistently jambs the second to last round in the magazine no matter the ammo or how many rounds are loaded in the magazine. 22lb. recoil spring assembly ordered from Galloway Precision for the next attempted fix...
Update:
Returned from factory, no explanation, invoice states, "Replaced barrel, test fired for function"
Range trip tonight, point of impact now matches point of aim. The pistol still consistently fails to feed on the second to last round from the magazine. Does not matter how many rounds are loaded in the magazine, does not matter which magazine, and does not matter which type of ammo, it jambs the nose of the bullet up against the underside of the barrel hood with the base of the case still in the magazine. Dropping the magazine allows the slide to move forward and chamber the round.
Ammo fired tonight was;
Underwood 200gr. Flat Nose Hi-Tek Coated Hard Cast
Ammo Incorporated 180gr. Flat Nose
Federal American Eagle 180gr FMJ
At this point I'm kind of at a loss of what to do. I may try sending it back to Smith for a second time or I may try respringing it. Galloway Precision now offers recoil spring assemblies for the 4" M&P 10mm, Wolff offers extra power magazine springs for the .45ACP magazines that work in the 10mm.
Original post:
So made it out to the range tonight withy new 4" M&P 10mm and it was not a happy range trip. Gun was cleaned and lubed prior to shooting. Ammo used was Underwood 180gr. FMJ flat nose, 200gr lead flat nose and 220gr. lead flat nose.
The good:
Very soft shooting for a 10mm.
Practical size; small enough to conceal and big enough to be comfortable to shoot.
Runs flawlessly until the second to last round in the magazine.
The bad:
Consistently low point of impact with all types of ammo.
Consistent failure to feed on the second to last round in the magazine. Does not matter how many rounds are loaded; 5, 10, 15 it always chokes.
50% failure to feed on the last round in the magazine after the second to last round is chambered and fired. The jam on the last round is a little unique, a live round sticking out of the ejection port straight vertically.
I'll be contacting Smith & Wesson's customer service. I really want to like this gun and be able to carry it. But as it stands right now it's not usable or reliable.
Last edited:
