Chronos wrote:I would guess the thin barrel walls would cool quite quickly between shots
Just thinking here, not testing, but yep... Common sense would dictate it will be nothing like the heat a rifle generates.
Lower velocity. Plastic wad loosely contacting the barrel, not metal been driven hard through it. And much greater surface area inside and out for cooling.
I've never really done sustained firing as I only hunt, not shoot clays, but 3-4 shots in quick succession is still perfectly fine to touch a 12 gauge barrel. It's warm but not hot. 4 rounds through your .30 and you know it when you touch the barrel.