I’m not brave enough to try.
I really like the HyTek coated bullets, the coating is very tough. Yet it can still be scraped off. Since the gas port is in the area that the bullet is still obturating, they are very likely to be scraped by the gas port.
Then there is the gas cutting as the lead is vaporized by the gasses passing by it entering the port. Even hard lead melts.
The first barrel on my Desert Eagle was very rough in the bore. The violence of the shot would chew copper off the sides of jacketed ammunition and blow copper bits through the port. Coating the gas plug with a gold, then green patina. The rest of the rifling tore copper off and deposited a flare around the muzzle.
Even in the new, smooth as a babies backside barrel I’d not chance it.
I wonder if the barrel steel is harmed by the low heat of melting out the lead? I’ll never know…