Seriously 1biggun, you get good sub-moa's with 75's in a 1-9? That's the only reason I was thinking of changing the original out. It shoots the 62 and 55's awesome out of the barrel it's got now, so if it doesn't really make that much difference with heaver bullets, I won't bother.
I love that older Bushmaster XA it really is a tack driver, just wish it had a flash hider, but whatever, but I damn near need a burning permit with my varmint loads with out one!!! I've caught the grass on fire a couple times shooting off the ground on a bi-pod,,caught my damn shirt sleeve on fire one day!!!!!! Damn fool,,,
I didn't think it was normal to work up that much of a sweat just shooting at chucks,,,,,
THEN I REALIZED I WAS ON FIRE!!!!! OH SHIT,,,,Andally,,,Andally!!!!
burned about a 2-3 " hole in my friggin sleeve,,,,
Had a hell of a time stomping it out!