Would suggest a good fitting choked 20ga. double for high volume dove shooting. Always take two guns, if you are going to use your own and stick to the 25 gram loads that are usually available there. Heavier shot sizes [7's or even 6's]works best for the longer shots. The 28 gram [1 ounce] loads will hammer you quickly if you are shooting a lot and is unneeded & quite a bit slower.

I have been shooting an RBL 20 & an older 60's vintage Miroku with much satisfaction. Both guns weigh under 7 pounds and neither has a recoil pad fitted.

Kind regards, tw