Whole different ballgame, Chas. A gun that throws slugs well (and, few doubles will do that well, unless they were built up as slug guns) may or may not throw patterns to where you are looking.
The slug guns built up by the Bruchet's had a bunch of work done on the barrels to get that to happen. My brother slug hunt with a Savage Fox model B (the cheapie) that consistantly puts the right slug on a pop can sized target at 50 yards-the slug in the left barrel goes, well, some where.
Best,
Ted
I'm not doubting this Ted, but would like to understand why a barrel would throw a slug away from the center of a shot pattern of the same load weight/velocity fired from the same barrel when held with equally deliberate "aim". The unstated assumption here is that your brother's gun prints that left barrel pattern where it should. Have patterns been fired from this gun with the same steadily aligned hold as with slugs, to remove fit as a significant variable?
I don't discount anecdotes as valid indicators, but they don't explain. I'd like to understand what the Bruchet's did and why.
Jay (After quite a few years I have to ask Ted ... hasn't the Chas. bit gotten kinda stale?)