Myself, I shoot 3 rounds thru the gun about as fast as I can accurately as I can run the bolt, breathe and aim. I have found that waiting in between shots definitely doesn't help us much as a shooter nor tell us what the gun will truly do as it heats up in a hunting scenario. Your last group kinda bears that out as well, you buckled in, ran the gun then let it cool. I know the gun will get hot, but shooting 3 rounds like that and you'll probably have more years out of that barrel than you can imagine, even with the firebreathing 6.5.
The LRX's look really darned good right there.
Might be worth trying to shoot 3 shots without getting off the gun next time MH. Seen if it nets you any different results, but to me, it looks like you have a shooter on your hands with the 127's.
