In the old days, Harry Pope was an advocate for the gain twist and his barrels did very well. Chances are, his barrels did very well because they were very well made; gain twist or no.
GT barrels are still well thought of in the Scheutzen matches, using lead bullets. I have seen some very good 22LR rifles built using gain twist barrels but, again, no evidence they are any better but do seem to be just as good. GD
