I'v recently bought a second hand bettinsolli diamond shotgun,the lad i bought it off has miss placed the manual book for it. was wondering if anyone knows how to work out these choke sizes
1st one got BT-IC IC=lead M=steal
2nd lead only BT-IM,
3rd BT-CL CL=lead timder steel
4th BT-full lead only
5th BT-IM M=lead F=steel
cheers