Thanks again for all your replies. My problem with trying to reset the striker was that I just held the pistol with my right shooting hand, and tried to rack the slide with my off hand just like I was trying to chamber the first round of a magazine.
The problem was that once the slide started moving to the rear, I couldn't control the distance it moved, probably because of the stiffness of the slide moving in a new gun.
Skeptic 9c, thanks for the hint on resetting the striker and controlling the movement of the slide. I place my off hand thumb in the trigger guard, curl the other four fingers around the top of the slide, and use these fingers to move the slide just enough to hear the reset. I don't know if this is exactly how you do it, but it really works great for me.
And leejack, thanks for the welcome, and for your observations on how the Sigma gets smoother with use...I've taken it to a friends house in a pretty rural area, and fired about 50 rounds into a berm behind his house. Nothing picture-worthy, but in just those few rounds, I feel the slide, magazine, and even the trigger loosening up a bit.
My wife just couldn't work the trigger...too much pressure needed, and so we didn't really know exactly where her rounds were flying (after one of them I did notice some birds flying out of a nearby pecan tree, and on a second shot, I heard a cow bellowing in the distance)...I then asked my friend if he was certain that the down-range area on the other side of the trees was secure, and he assured me that the cow really liked Sigmas, and whenever she heard one, she couldn't contain herself.
A few hours ago, I handed over the unloaded Sigma to my wife, and she kept trying to rack the slide, release it from a locked position, and work the trigger on a snap cap.
In a strange kind of way, I think she has enjoyed today with the Sigma, even though she's really having a hard time with her lack of hand strength in operating the pistol. She can double-action press the triggers on both my 642 and 325PD much more easily than the Sigma, and the grips seem to fit her hands better...they allow her to reach the trigger more easily.
Maybe a good k-frame .38 special revolver might be a better match for her. In the meantime, if she's still willing and interested in shooting the Sigma, I'll keep working with her.
I personally really like the way the Sigma feels in my hand, and the way it feels as I operate the various parts...I think it's because I've been shooting and carrying my little KelTec P-11 everywhere, and while it does carry concealed really well, and it has been completely reliable for the 450 rounds I've run through it, I really like the slightly larger grip and weight of the Sigma...it's larger than most compacts I've seen, and still not too large for easy concealed carry.
I think it even fits my Crossbreed KwikClip? that I got for a M&P9c...I'll probably have to use the ole "hairdryer heating trick" to better mold the ejection port part of the kydex to match the Sigma.
A funny thing about the "heavy" trigger of my Sigma is that the extra weight of the trigger pull helps steady the gun while I squeeze the trigger. And the rather short trigger pull (compared to double action revolver shooting) seems to help me focus better on my target.
Well, I figure I'd better get some sleep before the sun comes up. Hope you all have a great day tomorrow (today).
--Andy