All of my shotguns except my semi auto for ducks have damascus/twist barrels. I shoot them all. When I was living in England and Scotland I just bought regular 2 1/2" shells for them. They are all proofed for nitro. Now that I live in the states I have to reload my own lower pressure shells for them. I have just a few reloaded. I think I have 1200 16 ga 2 1/2" loaded and I'm not sure on 12 bore. Only have 2 boxes of 10 loaded. I use them mostly for grouse here in Alaska. Not much else to use a shotgun for up here.

that photo should be good enough quality for a blow up look. Look at the difference between the lines of the WR and this Parker.