Rockrivr1:
True.
So much mass, self-indoctrinated anxiety about “..they Say that Steel…”, yet the only recent well-publicized case bursts involving.308 ammo was with Brass-Cased Turkish ZXR or ZSR—-
In the early Middle Ages “they Said”
that people with reddish hair might be linked to the Devil.
If enough people say it, then….oh, and
black cats!
As for the bimetal-coated bullets, the detailed test by Lucky Gunner revealed that bullets from their steel-cased ammo required about 6,000 rds. to equal similar bore wear with 10,000 copper-jacketed lead bullets. Google “Lucky Gunner AR tests” or such. Lots of pretty colored charts and graphs!
They also suggested iirc that limiting barrel temperature might reduce wear from the bimetal coatings of such bullets.
Some young guys at my club fired so much nonstop ammo in about ten minutes in their AR-15s, in warm weather, that they probably caused some damage with US-made ammo.