125s work good for supers, if you go sub you can use heavier ones but the 110s are the best IMO. Brass was easy for me, I purchased everything I need to convert from 5.56 because I had a mess of those, but it has become widely available and you may still be able to get a few to play with.Considered building a 300 upper, had some pretty good deals coming into my inbox last week. Downside is I don't have dies or brass. Would guess the lightest .308 bullets I have on hand are probably too heavy too. Idea kind of waned.
Lightest I have in my stock is 165 grain. They use small rifle primers too, don't they. Another reason adding an upper in that caliber for me right now probably would not be a good move.125s work good for supers, if you go sub you can use heavier ones but the 110s are the best IMO. Brass was easy for me, I purchased everything I need to convert from 5.56 because I had a mess of those, but it has become widely available and you may still be able to get a few to play with.
Subs tested for the 300Blk are 220 grn, can't say 168 would or wouldn't work though. Yea, SRP, so that will definitely be an issue.Lightest I have in my stock is 165 grain. They use small rifle primers too, don't they. Another reason adding an upper in that caliber for me right now probably would not be a good move.
I have 500 168 grain match monsters on back order with midsouth, they would probably be a bit heavy for 300.