I've got a S&W Model 14-1 target master (.38 special) that I'd like to shoot more often. It's a K-frame and still has the original wood grips with the diamond in it and it's in pristine condition.  I'm afraid of damaging the stock wood grips and would save them by swap it out for some target shooting rubber grips. Can anyone recommend a set of grips that you have used and would recommend and/or ones I should stay away from? Also what's the difference between a grip with a square butt versus one without aside from the shape? Which one is preferable over the other?

For shooting, i like the factory rubber Hogue grips that came on my 629. Square vs round is what you need to determine before ordering.

I like the Pachmayr gripper grips.

http://www.bing.com/shopping/gripper-s-w-k-l-round-butt-sk-g/p/64B32EE0C1101DCF5012?q=pachmayr+grips+for+revolvers&lpf=0&lpq=pachmayr%2bgrips%2bfor%2brevolvers&FORM=CMSMEE

Rubber Hogue grips are the best.

They get the kingkeoni patented
 

+1 more for Hogue grips.

+1 Hogue Grips 

Arhends grips on my smith. They are pretty and comfortable.

Badger makes real nice grips. Have a pair on my 629.

Arhends grips on my smith. They are pretty and comfortable.

I have a pair of Ahrends grips on my S&W M65 and like them too. If you want rubber grips, I still prefer the Pachmayr Grippers.

just put some hogues on my k-frame. i may try the square butt version of this to see how it is.