I have 3 M&P pistols. A FS .45, a FS .40 and a 9L. I also have a .357 Sig and 9mm threaded barrel for the .40.
The 9L is the most accurate 9mm pistol I own. More accurate than my P210 and several HK P7’s. The .45 shoots great, but the .40 gun is just meh.
My accuracy standard is 2" at 20 yards from a rest. So far, the only way I can get 2" or better is with the .357 barrel in the .40. And I have tested a lot of different bullet weights, powders, etc. I have only found a couple of .357 loads that work to my satisfaction. Even more challenging is getting one that will shoot to the sights.
The first indication a bad guy should have that I'm dangerous is when his
disembodied soul is looking down at his own corpse wondering what happened.
Ah, not necessarily it depends on the QC protocol, in this case, that S&W adopted. Inspection is expensive, modern technology facilitates a lot of it and lowers the cost, but sampling is quite normal in large production facilities. In fact this might explain why there's one and 2 dots out there. Sometimes a Rockwell test comes back with hardness either too soft or too hard, in which case a retest might be performed or a re-heatreat followed by a retest. In this case I'm asking what those dots look like (in the flesh) as its hard to tell from the pics whether they're in fact a mfg. change code or RC test hits. Dont know.
The dimples I've seen aren't C scale perpetrator marks.
They could be B scale. If it is hardness, it looks like a 1/16 penetrator iirc.
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Smith & Wesson M&P9 Pro Series C.O.R.E.
I recently purchase a new Smith & Wesson M&P9 Pro Series CORE pistol with a 4.25” barrel. This pistol has a serial-number prefix of “HBL” and the factory test-fire date is 5/17/2013. This pistol came from the factory with one of the “single-dimple” barrels previously described in this thread. I conducted a brief accuracy evaluation of this pistol at a distance of 25 yards shooting off of a bench with sandbags. Shooting was conducted with the pistol in its stock configuration, except for the mounting of a Trijicon RMR07 sight. (I did install an APEX trigger after the testing was completed, as you can see in the picture above.)
Control Ammunition. The ammunition used in this evaluation consisted of hand-loaded Hornady 124 grain FMJ-FP bullets (#35567B) with a nominal muzzle velocity of 1050 FPS. When fired from my 9mm test platform (a bench-rested Colt 6450 with a free-floated, stainless steel Noveske barrel with traditional rifling) this load consistently produces 10-shot groups at 25 yards that have extreme spreads of less than one inch. As an example, the 10-shot group pictured below has an extreme spread of 0.76”.
Control Group. Prior to shooting the M&P9, I fired a 10-shot control group at 25 yards using another polymer-framed 9x19mm pistol that has previously proven to produce acceptable accuracy; a Springfield XD(M) with a 4.5” barrel. This pistol was also fired in its stock configuration, with the exception of mounting a Trijicon RMR07 sight. The 10-shot control group (pictured below) had an extreme spread of 1.92” and a score of 100-9X on the B-8 target.
The M&P9. I obtained a rough-zero for the M&P9 pistol at a distance of 7 yards. A 10-shot group fired at that distance formed one ragged hole. Moving the target stand back to the 25 yard line, the M&P9 turned in a 10-shot group that had an extreme spread of 2.31” (shown below).
After a couple of adjustments to the RMR07 sight, the M&P9 was shooting dead-on for a POA=POI zero at 25 yards. A 10-shot group fired on an NRA B-8 target produced a score of 100-7X. The extreme spread for this group was 2.33”.
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Last edited by Molon; 07-24-2013 at 05:54 PM.