https://www.gunadapters.com/smooth-bore-adapters/ Anyone have any experience with these short tubes? Price is right at less then $30 per tube!! Briley's short tubes are about twice as long but also about $300 per set... I have my Grandfathers old Knickerbocker SxS 12 with 2.5 inch chambers and a gunsmith(since passed on , God rest his' Soul) told me I should probably turn it into a wall hanger. But I'm thinking it might be reasonably safe to shoot 20 or 28 gauge thru either these or the Briley adapters? I assume that you would lose a fair amount of velocity with the short chambers then a jump to the larger bore? Anyone have experience with the short tubes? I know you can get the full length tube sets from Briley but I can but a new gun cheaper then that so that's not a wise option.