tj, I would say you are a blessed man. Not because you live in Virginia, but because your HA Bren is working well with no fiddling. I would just run it. Don't worry too much about battering. Keep an eye on the striker , striker spring and rear portion of the trigger frame, internally.

Do try various ammo sorts if you can come by some variety, just so you know what works and what doesn't. The jury is still out on the Wolff steel .303 for me and mine. Need more range time myself. Also want to work up some loads on the bench.