I’m just not seeing much in 30s that’s truly worth the effort for a few hundred FPS over the 300blk, with 125s. I don’t think any of them is enough ‘more’ than a 110-120gr 6.8 at 2500-2700, to lose any sleep over the effort to shoot the others. I’d probably just grab a 300 upper and go...unless I just wanted to play with loading for ARs vs shooting and killing stuff with ARs.