Originally Posted by
Screwball
Sorry, but that is not correct…
I have a 16.5 ounce 642-1 in 9mm, which I shoot Hornady 147 grain XTP. Not a cold round. I’ve tested multiple cylinders with a single test round (shoot four, reload new rounds in the clip… shoot four, reload new rounds in the clip; after five cylinders, I stopped wasting ammo), never an issue. By all rights, if you shoot four rounds without issue, you are good.
I’m not saying all 9mm crimps are identical, but Hornady is good to go. Airweight and warm 147 grain isn’t a recipe for anything if you do your homework.