At my local shooting club, I normally shoot a Fox double of one description or another or occasionally my pre war Ithaca M37 20 gauge with a solid rib. These usually don't result in any questions or comments.
I'll occasionally shoot my cased Holland & Holland back action hammer gun and that often results in strange looks and an occasional "are you going to shoot that?".
To those that are interested, I'll tell them about the gun, when it was made and show them the 1 1/8 oz Nitro Proof marks on the barrel flats. I tell them it has 30 inch steel barrels choked about IC and Mod and has 2 1/2 inch chambers. I shoot it with reloaded 2 1/2" RST hulls loaded with 1/2 ounce of lead shot. And there isn't a target on our sporting clays course that can't be broken with a half ounce of lead shot.
And to those further interested, I'll offer them the gun to look at and point. Most are very pleasantly surprised.
It's a sweetheart.