I've got a nice S&W 15-3, it came with the original service grips. Didn't seem to fit well, so I bought a Tyler T, which helped a little. Still, I'm having a problem keeping a good grip on the gun, it really likes to ride up in my hand, and I'm getting tired of having to reposition every other shot! It seems to me that either 1) my grip is all wrong (don't recall having this problem on my dad's Trooper MkIII), or 2) these stupid, blocky magnas are to blame. I feel like the grips may be to "square" in profile for my hand. Any advice? I feel like magna sized "coke bottle" grips would be about perfect, does anything like this exist?