Just dug up my issue out of 3 weeks of mail that accumulated while I was on vacation. Nice mention of the 450 BM, and they listed it first before the other large caliber platforms that they reviewed.
BTW, I sent a letter (which got printed) to Gun Tests Magazine extolling the virtues of the 450 BM after they ran a lauditory article on the .308 AR platforms. I suggested that "perhaps" they should do an evaluation of the 450. They replied that "perhaps" they would.