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LOL, there were various other factors involved, beyond S&W's lack of commitment for the 10mm, as well as the soon the be ubiquitous 40 S&W, not accuracy.
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Laugh all you want, it doesn't change the facts.
For the record, I once owned a S&W 5906 (I think), obviously a 9mm. It shot 12-20" groups from 20 yards, regardless of ammo, regardless of shooter. It was my very first semi, so I didn't know any better.
About a year or so later, I got my first 1911, a Springfield Mil-Spec. Even with the sorry two-piece bbl, it shot groups 1/4 the size of the 5906. I later had a smith install a Wilson bbl, which allowed it to shoot cloverleafs IF I did my part.
As I got into IDPA (I Don't Practice Anymore) & IPSC (later USPSA), 3 Gun & Steel Plate matches, I noticed something. Not a SINGLE 3rd Gen Smith in ANY of those matches. None.
As I later added Beretta 92FS models, H&K models, FN models & other top brands, I quickly realized how FAR behind S&W was in the semi market. As in virtually dead last.
Now, I LOVE my Models 41 & 52. They are examples of what S&W could've/would've/should've done decades ago but didn't. They settled on mediocrity & were welded to it. The M&P semi line continues this fine (gag!) tradition today.
It both mystifies & saddens me how S&W can make all those revolvers with such wonderful accuracy & then turn right around & make such AWFUL semis. When I become King of S&W, that crap will change most ricky tick. Imagine, if you will (Rod Serling voice), a M&P semi with a Kart/Wilson/Bar-Sto/FN bbl in it? I would be willing to pay another $100 for that to happen. But Smith races to the bottom to this day.
For the record, I bad mouthed Beretta when the 92 first hit the US. Then I bought a used one & used it in IPSC & 3 Gun matches. Thousands & thousands of rds later it will STILL shoot a cloverleaf IF I do my part. Original locking block & barrel too.
My .o2