I did load testing with mine last weekend using my Ransom Rest. I think I am kind of hard to please because of the tack driver accuracy of my Les Baer 1911. The Stealth Hunter shot some terrific groups (best was about 5/8" for five rounds at 25 yards).
Problem was, the Stealth Hunter or something about our setup was not right in spite of our going over everything carefully several times. But although we had several sub-1" groups, nothing except one load we tested was very consistent, some loads had lots of gross fliers.
The best load was with 18 grains of N105 under a Hornady 200 grain XTP, CCI 300 primers, PMC brass, chronoed at about 1400 FPS.
The absolute worst powder we tested was Alliant Power Pro 300MP, which is a pretty new powder supposedly designed for magnum revolvers. It is so fluffy that it fills the case right on up. Tested 27, 28, and 29 grains of that stuff and had fliers sometimes of 10-12". Worst performance I have personally witnessed on the Ransom Rest with any gun we have tested. Nasty stuff. I think it will make good fertilizer though.
We also had great fun shooting at 100 yards, both paper and steel targets (an MGM 4 paddle dueling tree of AR500 steel plate). After we got the Aimpoint sighted in, we could hit those 6" plates probably 90% of the time. We were shooting from a crappy plastic Caldwell WobbleRest.
I am REALLY liking this gun. I got a set of the S&W 500 grips for it, and I am at the point where I don't feel the need for them. I am comfortably shooting hot loads with it using some nice Hogue cocobolo Monogrips. And they sure LOOK purty!
The 500 grip is really designed for the X frame, and this Stealth Hunter is an N frame. They fit (kinda), but after firing a couple rounds it develops a pretty good gap between the top of the backstrap/frame and the rubber. The frames are enough different I think that the grip doesn't really fit correctly. I did note when I ordered it that 629s and 29s are not on the list of guns they are supposed to fit anyway, so I'm not all that surprised they don't fit right.
They do add some girth that I liked (I have kind of large hands), but I am liking the smooth wood more, so the woodies are staying on it for the near future.
My buddy and I also did some gunsmithing on it. We followed JM's Trigger Job video and that really helped. We also used a Power Customs stoning jig with the adapter for the K/L/N frames. Makes it easy to keep the angles straight and square.
Before the work we did, my DA pull was about 12lbs, and rough on both pull and return. After the work, it is 8.5lbs and very smooth. Way easier to keep the sights aligned during the long DA pull.
The SA pull stock (Lyman Digital) was about 3.8lbs. Not bad, but I wouldn't mind it being lighter as long as it's still reliable. To that end I installed the Wolff spring kit with a lighter mainspring and a selection of 3 lighter return springs. I installed the lightest of the return springs.
After all the surface smoothing work we did and the spring kit, single action is consistently 2lbs 8oz, very very nice. I also adjusted the mainspring tensioner screw so it was bottomed out and then backed off 1 1/2 turns. That resulted in about a 7 1/2lb DA pull. Felt great but lots of failure to fire both factory and my handloads. So we tightened it a bit more and measured 8 1/2lbs, now it is 100% reliable for about 400 rounds fired since the adjustment. I pulled the screw back out and put a drop of Loctite 242 on it and screwed it back in to the same 8 1/2lb pull.
Fortunately the monogrip is so easy to put on and take off, and it clears the little bit the tension screw is protruding above the frame without interference.
It did not appear as if any gunsmith who cared about his craft had ever touched the inside of the Stealth Hunter. It was pretty sloppily done. I think they just get it where the SA pull is between 3.5 and 4.5lbs and ship it. Every surface that should be smooth was pitted and / or rough with machining marks left over. Engagement surfaces that should have been rectangular/square were trapezoidal, and the gun was completely dry with no evidence of lubrication when we first opened it. Really kind of shoddy workmanship considering they pass these Performance Center guns off at high prices because they have supposedly been breathed on by S&W's Master Gunsmiths. What a joke.