I've used thousands of rounds of lacquer coated ammo with no problems of any kind.
If you think the lacquer will melt, try using a blowtorch on a fired case. It will eventually burn, but not melt.
I don't know where these old wives tales about steel cased ammo came from, but they're just that. Old wives tales.
For those who have fought for it, freedom has a taste the protected will never know!
Or at least they did before political correctness