I have a new S & W 36 round butt classic revolver and an older model 27-2 .357 mag. I am looking to put Pachymar grips on them, but it is hard to choose, since the gunstore doesnt let you try them out first. I am thinking of the Compac for the 36 and Gripper Professional for the 27, but I welcome opinions from anyone with experience with these models. My hands are a little bigger than average. Thanks in advance.