Originally Posted by two-bit cowboy
Here are a couple comparison shots that may help a wee bit.
The first image shows (from right to left) the original rubber grip on my M&P 340 -- might be the same one that came on your 637. Next is an Altamont rosewood combat. And finally the Karl Nill Centennial model -- it's the biggest set of stocks I've seen for a J-frame. I carry my 640 Pro with these stocks everyday and everywhere, and it's a pleasure to shoot -- feels like a K-frame...
The second shot -- if you want to stick with rubber -- shows two Hogues. On the right is the Monogrip on a 360PD (same dimensions as your 637), and on the left is the Centennial Tamer...
Got to admit a personal preference for minimalist grips (my M340 wears a Bantam), on a hideout J frame. That said, the Nills on your 340 are REALLY NICE!
Any thoughts on a comparison between the Nill grips shown, & the Hogue Centennial Tamer?
Both would seem best suited for OWB holster carry.
My early M640-1 wears the Tamers (great ergonomics), & gets carried in an Andrews Saddle Style (pancake). Real nice, comfortable carry piece of leather, BTW.