Fluff!
Happy ta have yer input! Yup, can/may/might on tha gain twist, even some upper end airguns are choke bored and tha smith choke bores/laps his barrels.
Tha non gainies shoot inta one hole at twenty five yards. Even tha navies he did fer me'll do that from his ransom rest at twenty five yards, non gain, but DEFINATEly lapped, choked and aligned to tha chambers and tha chambers about a thousand a half over tha groove diameter of tha barrel.
Right about those two inch .38s, smith usta shark shoot like hustlin pool when he was a kid with em. Says ya just gotta know HOW ta shoot!
Says in THEORY, ifin ya gotta PERFECTLY round ball No lead shaved off, basically almost NO bearin surface, tha gain MIGHT show an advantage, buts not tha reality we're dealin with.