I'm building an AR in 350 Legend specifically for plinking and hunting predators, using cast bullets. I chose 350 Legend, because of the AR calibers, it seems like a very good choice for cast bullet use.
I just slugged the new barrel. It was hammer the slug (tight), then push by hand, then hammer again, then push by hand, then hammer yet again, and then the slug fell out. (It's a relatively cheap "AR Stoner" barrel from Midway) So, several tight and loose spots in the barrel.
Sounds like I better hand lap the barrel, right??
Vettepilot