These are all the grips I've made so far. I've done three sets in the last three weeks. From left to right;
Kudu horn on Single Seven
Merino Ram's horn on Bisley 45 Colt
Maple on Bisley 41 Mag
Bocote on SBH Bisley 480 Ruger
Rosewood (of some kind) on Bisley Hunter 41 Mag
The kudu turned out to be unimpressive, so I'll probably be trying something else for the Single Seven.