How about the checkered F from the late 30’s cant be many of those
Not many made and I think one in 22HP would beat out a 99-T, 22HP.
For this quiz I think you first have to list all the variations before you can put them in order. Who wants to take that project on?
First you have to define what constitutes a variation.
That's a tough question right there.
But you're looking at 57 basic models, and 140+ variations of them. Add in different cartridges, and it's much higher.
Most rare catalogued? Okay.. 1899D musket in 30-30. It was catalogued and there's no reason it couldn't have been made. I think a count of zero known to exist might win the rarity contest.
Most common? 99EG in 300. With 99C or late 99E in 308 possibly going as high.