I haven't seen many posts here on the PPQ SC in general, so thought I'd share some of my observations and testing after having spent a few months shooting mine regularly (about 500 rds so far). Maybe some of you are curious...
Methods and materials:
I have a Q5, a Navy PPQ M2, and a PPS M2 for comparison (yes, I'm a Walther fan-boy, no apologies...). All except the Q, have Crimson Trace railmaster green lasers, and the PPS has the CT laserguard green they make for it. The Q has a Burris FF lll red dot. I usually shoot all 4 pistols at range sessions that last around 2 to 3 hours. I shoot a combination of off hand, and with a Protektor rabbit ear leather bag for accuracy testing and laser/red dot alignment at 7, 10, 15, and 25 yrds (the farthest I can shoot at this indoor range). Trigger pull weights are from a Wheeler Pro Digital Gauge, 20 pull avg. The accuracy testing was very consistent from the bag and very informative concerning the inherent accuracy these pistols are capable of with different ammo (some ammo is clearly better than others..). I zero my lasers at 15 yrds with point of laser = POI. At 7 and 10 yrds POI is about 1" high, at 25 yrds POI is about 2" low. My defensive round is the Federal 147gr HST, and my companion training/target round is the Speer Lawman 147 gr - ballistics/velocity are very close and recoil identical with excellent accuracy. My low power round is the ASYM 147 gr RN reman. All are subsonic.
After running around 200 rds through the SC (makes a huge difference) to loosen it up, I settled down to some specific testing of the trigger, accuracy, sights, and magazine compatibility.
First thing I wanted to see was just how close the SC trigger is to my other PPQ's. All the PPQ triggers have stock, well-worn in, smooth, light, and overall excellent triggers w/ approx. 4lb pull weights - 1/2 lb less is you use the trigger tip.. very spoiled by them. The SC and standard PPQ's have physically different trigger mechanisms, but have some similarities as to feel. The SC first stage pull weight and feel is very close to the PPQ, but a little grittier- that may smooth out more later.. The standard PPQ has a smooth, short, and light second stage travel to the break, about 1/2 to 3/4 lb from the first stage. The SC has a gritty, uneven, and longer second stage that's about 1 1/2 lbs to the break (5lbs total). Almost feels to me like there's a mini 3rd stage in there with a separate "mini-wall", then more creep to the break.
Two comments here: if I pull straight through fairly quickly from the first stage wall, I don't notice the creepy uneven feeling as much if at all. Personally when practicing for accuracy I like to pull through the second stage more slowly, which is just fine with the standard PPQ triggers and their short break, but drives me to distraction with the SC.
My other thought is that for a CC gun, that extra second stage travel and resistance might be just what would be most appropriate - similar to the PPS M2 trigger in that regard, also a CC gun. Under stress, or firing for speed, I didn't really notice the negative aspects of the trigger travel. Overall, and considering the fact that the SC is meant to be a carry weapon, I think the trigger does a good to excellent job - but it is not a PPQ M2 trigger.
Overall, I do prefer the SC to the PPS M2 trigger, mostly because I can stage it before I pull to the break. (But I still love shooting my PPS and CC with it is a breeze).
Accuracy (from a bagged bench rest)::
Overall, the SC shot just as accurate as the full sized PPQ's up close (7 to 10 yrds), but it was a little harder to line up due to the reduced sight radius at longer distances (15 to 25 yrds). I'd say exactly the same thing about the PPS M2 too. But from my testing, Walther has very accurate barrels in any length, and the SC is no exception.
The LE phosphorus sights on the SC are exactly the same ones as on the PPS M2 LE. The dots are big and obvious to pick up for me, but many people don't like them. Standard white dots stand out a little more in daylight as many have said... I may grab some TFX Pros one day to try them out, but these LE's work well enough for me. Using the bag, having the tops of sights lining up, I got a sight picture #1 (6 o'clock) as most accurate and lines up perfectly that way at 15 yrds with the laser and POI. That was a surprise, since Walther calls them "combat sights", and others have said Walther sights use a "combat sight picture #3" (sight covers target). Before I started using a bag for consistency testing, I always thought that my Walthers used a #2 sight picture. All could probably work, depending on how you line up the front sight vertically with the rears. Actually, if you align the center of the "dots" only (not the sight or dot tops) to be centered in appearance up down, right left, you'll end up pointing the front sight down slightly. Then raising your POA to a combat picture puts your bullet path right back on target. The effect is hard to quantify if you dont have a stable and repeatable rest, but that's what I found. Using the laser's reference zero at 15 yrds, it's actually easy to see what front sight adjustments to use that make any sight picture work to achieve POA=POI.
One of my biggest disappointments with the SC, is that there is not universal compatibility with the PPQ M2 family of magazines, since I have many 17 and 15 rounders for my Q5 and Navy. Apparently, the springs in the standard PPQ mags are slightly weaker, and the dimensions are ever so slightly smaller than the SC's. That said, I tried using the standard mags with my SC anyway, with basically good results. The 15 rd mag sleeve from the SC mag fits perfectly with the standard PPQ 15 rd mags. When inserted, the feel very slightly looser (side to side, up down) than the SC one, as do the 17 rounders. But once a round is chambered, all the mags tighten up. The mag sleeve fits the standard 17 rounders too, but is too tall by about 1mm so won't allow quite enough insertion to grab the mag catch/release. I just run them without a sleeve for now. I'm getting a couple of new sleeves, and I can dremel one to make it fit. The only issue I've had using the standard mags in the SC, concerns the ammo type. My flat nose Lawman 147's will occasionally jam up against the bottom of the feed ramp. They don't do that with the SC mags (both 10's, and the 15 rd). But I haven't had any issues with any round nose ammo, or my hollow points (147gr HST's). I think the slight up down looseness or weaker mag follower springs are probably to blame. For range work, I don't see any major issues using the standard mags in the SC - just be aware some ammo may not function as reliably in them. For CC, I'll stick to the smaller dedicated SC mags anyway. Really like the 10rd with finger extention for that. Really don't
like the fact Walther couldn't have designed the SC to use the standard PPQ M2 mags - so dimensionally close anyway, but just different enough... seems a shame not to have full compatibility.
As a carry alternative to my PPS M2, I like the SC a lot. I'll probably use the PPS for maximun concealability in warmer months, and the SC for more firepower and control ability in the colder months, but its still a good compact size for CC in general. A good to excellent trigger for CC, but not quite as nice for target shooting as the PPQ/Q5 triggers (but what is...?).
More accurate than I am, and totally reliable with any of its mags made for it - mostly reliable with standard PPQ M2 mags.
Could I live without it? Having a PPS M2 already, I'd say yes, but I'd rather have it than not. I like choices for CC besides lugging around a full sized PPQ.
Overall, I think the SC might be best described as a gun "in-between" the PPQ M2 and the PPS M2 in many ways, and that has some value to me. Maybe not for others...
Aside from my gripe about magazines, it's too bad they also didnt think to mill the slide for an optic as an option. I'm still not sold on one for CC, like what's offered on the new PPS RMSc. Hell, the cost with the dot optic is more than double what the standard PPS M2 costs w/out ($315 vs $650). Of course, if I had one, I'd probably love it and learn to work around any concealment issues, but thats what fan-boys do, right?
I'm curious as to others experiences with the SC, so please chime in.. (are you around, Imaoldfart...?), but please don't flame me too badly for using lasers and bench bags. I use them as tools for gathering accuate information about aiming, accuracy, and to give me any edge in a situation where I'll probably need all the help and luck I can get. But I train a lot without them too, and I don't rely on them.. I also don't rely on anything else working perfectly either, since there's many points of potential failure when using any firearm, at least in my experience.
Also, some people, like my ex, believe I must be from Mars, which might explain why I tend to be attracted to green lasers and green phosphor dot sights....