Is their anyway to tell what the velocity is of the shot if it dosent say on the box? I have a box of 12ga Winchester super Double X Magnum Copperplated shells and i just bought a new carlsons choke, and it says not to exceed 1550 FPS, but im not sure what the velocity is. (Any tip would help Thanks)

1210 fps is what I get for a search.

What shot charge weight? What shell length? And what were you plannning on hunting with this combination?