RE: Heavy Barrel
The main reason for a heavy barrel is the reduction of barrel harmonics. Heavy barrels in general can be more accurate, and should be more accurate. But a thin barrel can be just as accurate if made, and reloaded for properly.
I do not know if a heavy barrel will displaceheat any better. Butit does take more shots to heat the barrel up. Andheat will affect the harmonics of a thin barrel faster than they will affect a heavy barrel. Tom.