I've got a 300 H&H that I'm carving a new stock for. The reason I'm doing this is because the old one is cracked at the wrist, recoil being the prime suspect. A gunsmith friend told me its probably due to a loose tang screw sometime in the past. So, a cross-bolt - ala 1950's M70 African - would seem to be an obvious solution. Any comment on this idea - is the part(s) readily available?