Hi all, It's about time I made my first post, I've been reading this forum for years. Anyway I picked up an AYA No.3 3" Magnum the other day in excellent condition, serial number and code date it to 1964, but I'm noticed that on the barrel flats it appears to be proofed to 900kg. What constitutes a "Magnum gun"? I thought the majority of these were proofed to 1200kg. Also being a 3" chamber, does that mean I can put any 3" commercial cartridges through it without any worry?
Cheers