Perhaps shoot a barrel out is a better term, which for a 1911 used to train Marines for a period of years, shooting tens of thousands of rounds in bad conditions, multitudes of shooters etc., but most likely, the slide will wear out faster.
Last I checked, the Marines didn't ever train that extensively with a pocket .380, and to blow that kind of smoke up your rusty butt over that type of firearm is about as ludicrous as anything he could have said.
My oldest son just borrowed (Hah! Borrowed, just like my 8 Horsepower Shop vac he has had for 5 years, my broadcast fertilizer spreader he has had for 4 years, and a few other items) a box of .380 fmj and 14 hollowpoints. Yep, I figured I was giving him the ammo, and my defensive .380 hollowpoints only get fired at the rate of 14 per year, so a box of 50 normally lasts me close to 4 years. The only real need of ever shooting 300 rounds through a pocket .380 is to break it in initially, after that, if you shoot over 50 rounds a year, it is probably because that is the only handgun you own.
Anyhow, he had won a shotgun in a raffle, having plenty of shotguns, and recently selling his Kel-Tec P3AT, he asked the gunshop if he could get something other than the shotgun and settled on the bodyguard .380 with a laser.
I held the little .380, tried the trigger....not as smooth as my Kel-Tec, and it felt the same in my hand.
Go back to that shop, buy the PT380 and if he starts his spiel again, just give him a big old toothy smile and say Horse Hockey!