When I competed in m/l roundball rifle competition I began shooting an Appalachian style mountain rifle which had no butt treatment at all, just smooth sanded and finished wood. It slipped around and caused me angst. I glued a piece off a roll of 80 grit emery cloth to it, with the rough side out. It stayed where I put it from that day on. Worked wonderfully, still on there.

You may not want something so obvious as that on a nice English double, however.

SRH

May God bless America and those who defend her.