Have a new revolver arriving next week and have been going to 'You Tube' to see what people have to say about the gun.
Most is very favorable but one thing that stands out is that the trigger pull was over 15 lbs., as his gauge would only go to 15lbs. Might the high trigger pull be because it does not have a internal lock and it's this way, to avoid lawsuits or is there something else that I am unaware of. I already have two model 60's, one from the 1970's and a recent one from a couple of years ago and the trigger pulls are not that high.
I have noticed that it is possible to replace the trigger return spring and the hammer spring for a lighter pull weight but one does not want to go to light. What spring weight would be best without going 'too' light ? Even though this gun is set to fire 357 mags I personnaly won't be doing so as it punishing to the gun and of course to one's hand. 13oz is pretty light. Anyone who has a snubby and can offer some advice about the care and feeding of this gun would be much appreciated.

I personally wouldn't mess with the trigger pull. There may be springs that can lighten it, but since my M340PD is my every day carry gun, reliability is very important.
The care and feeding of this beast is shoot it enough so you are completely familiar with it and no more, at least with full power Magnums, which is what mine is always loaded with.
The term "Shoot little, carry often" was made for this revolver.
Jim

Ignore the internet static and try the M&P 340 you ordered after it arrives.

I own a pair of them, an early production M&P 340 with the ILS (lock), and the more recent variation made without the ILS. (Just an excuse to own a pair of them. )

The ILS, or its lack, have nothing to do with the trigger. The same main (hammer) spring and rebound slide spring (15 coil/light blue paint) is used in both guns.

I actually carry & shoot my first M&P 340 (equipped with the lock) much more frequently than I do the newer one.

Why? The trigger is smoother. I've shot it and dry-fired it a lot more. It's my "range beater" among my assorted J's. I'm going to try and wear it out.

The Magnum ammunition can be pretty rough in the way of felt recoil, granted. The torquing/whip is more3 noticeable than when using +P loads. Not as bad as the much lighter PD's, since the M&P has a littel more weight due to the PVD coated stainless steel cylinder (instead of the PD's titanium cylinder). It will still get your attention, though.

When I was first checking mine with Magnum ammunition I found a couple of brands that exhibited bullet pull (bullet jumping the crimp), and some that didn't. (Read the manual about checking ammunition for such potential issues.)

While I can use Magnum loads to shoot accurate and controllable shot strings, I simply prefer to use +P loads for most training, practice & carry. As well as I can shoot the Magnum loads, I can shoot the +P loads faster, and especially under more demanding conditions for drills.

Personally, since I only own & use my J-frames for dedicated defensive weapons (off-duty & now retirement CCW), I don't lighten the springs. I've previously tried one of the heavier "reduced power" rebound slide springs in one of my 642's, and while it allowed for consistent trigger recovery, I soon found my index finger could "outrun" the trigger's recovery when running the gun through fast-paced drills. Not a good thing when you find the trigger isn't ready for the next shot.

Also, while the lighter springs might have enough power to function the guns under "ideal" range conditions, they don't have the same power as the factory springs, and I'd rather not have the gun fail to function as desired under "less than ideal" conditions (dirty, contaminated with fouling, debris, lint, dried oil, etc).

You're already familiar with the steel model 60's, right? Aside from some additional felt recoil & muzzle whip (because it's pretty much an Airweight), you probably won't find the trigger any different than your recent production M60.

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Ret LE Firearms inst & armorer