If that's a #1 Tylet T-Grip, it's made specifically for a J frame. You need a # 4 for your N frames.I think this one will find a permanent home on the 3.5" blued 27-1...
http://www.t-grips.com/TGrips.html
I have been looking for a well aged brass #6 for my Colt 1917, but so far nothing. I think I am going to have to just bite the bullet and send my order form and money off to Newalla Oklahoma and get in line.