I've got the TR-42 Older and the Newer one for the 300 grain, and i can tell you first hand it kicks Butt, highly accurate both of them. Dime size groups at a 100 yrds with Hornady factory loads and my own are Lapua brass with 88.5 grains of Accurate's mag-pro and Seirra's 250grain bullets.
The Only drawback is the price of all the crap nickle and dime-ing you to death the muzzle brake
,the bipod ( which is great bi-pod),the picanny rail syatem,mags BLA BLA BLA.But it is a greaaaaat shooting gun adjustable trigger (EASY ADJUSTMENT) and smooth. As for the McMillon i know they build state of the art guns their barrels need some attention. It's not a Kreiger but their stocks are the best, their is (NOT LITE THOUGH) so you might have to suck it up if you don't have some meat on your bones...H&S Precision also makes a awesome gun.I have one of them also,shoot's dimes also. little more kick than the TRG though but it s a lot lighter.Noe for the Barrett im waiting for miner to come in to do the T&E on it. I was shooting up at Camp McKoY WIS, and the head cheese in charge was kicking our butts at the competition. Of coarse i didnt have my TRG their also which didnt help,,,OH WELL Next time i wont bring a pea shooter (223) to a real match with the big boys...The Barrett is light & very accurate and has a great muzzle brake that works 100% and it is around $4300.00 from Schryver Gun Sales - Forreston, Illinois
if you are looking for a dealer...WOW, i guess i can type .....JDLOTTO