Walter,
Steelcased does nothing to the barrel. It “can be” harder in extractors, but that’s it. By harder on extractors we’re talking about crappy lacquered coated, sticky cases reducing extractor lifespans by around 20-30%. It’s a $2 part.
Some steel cased ammunition uses bi-metal bullets which can reduce barrel life by about 20-30% again, however the cost difference is huge. Even factoring in barrel wear for blasting ammo, GOOD steel cased is way better for $ per shot. Good steel cased is typified by Hornady’s steel match. Have shot hundreds of thousands of it, with no noticeable issues over normal brass cased.
I do not shoot steel cased Grendel, but only because volume practice is done with 5.56mm’s. No need to shoot 20,000 rounds of Grendel a year.
Hot Damnn!
