My Browning Citori came with a modified choke in the bottom barrel and full choke in the top barrel. Is this the proper placement for these chokes? Thanks.
As Miles58 explains, typically you want the bottom barrel to shoot first. Not only does it produce less felt recoil but it results in less wear and tear on the gun.
On a S X S, typically you want the inside barrel to fire first for the same reason.
The reason it depends is that the set up you have is typical for flushing birds such as quail or pheasant, or most clay target games. On driven birds or pass shooting you would want the chokes the other way around.