I never did that great w/ the cougar - it does have less than even a 4 inch barrel - so, I attribute it to that.
I got one when they very first came out - For such a large grip, it really should have a longer barrel. Anyway, while it always worked, I just didn't do as well at the range as I would have liked. So, I sold it in 99, I believe.
My SW99 is one of the 1st 4" barrelled guns that I have shot so well w/. Usually, it takes me a 5" barrel to shoot well with. Not sure if it is the weigh, barrel length, or sight radius that does it for me. Anything under 4", and I can't group that well, even at 7 yards.