Never gave it any thought that 32 H&R Mag would not chamber in 32-20.

Decided to check Lyman's 47 for external dimensions at necks -- 32 H&R mag is given as 0,337 (ditto for 32 S&W Long) and 32-20 given as 0,3307. Chamber dimensions not given. Sure hope someone is not so unlucky as to stick a 32 H&R Mag into an old S&W Hand Ejector or Colt DA 32-20 revolver with slightly oversize chamber.

Nice to know that there is some protection against such an idiot ammo substitution.

Thanks,
Niklas