Buddy of mine is using the 77, and loving it! 2900ish I think is what he's getting out of a 26" barrel/VLD magazine. So far these aren't the best fur bullets I've seen with some big exits, but for long range they can't be beat for terminal ballistics from anything else at 223 velocities. So far he has a 565-yd. dog to his credit and I spotted for him using that bullet for 2 out of 3 cottontails he nailed at 700-730 yds. running all the dope for those shots on a calm morning. 3rd was taken with the 75 A-Max--6 shots total for 3 bunnies. That was impressive to see accomplished I tell you. Fun spotting and shooting.
We now have the polymer-tipped 69/77 TMK, 73/75/80 HORN. ELD'S with BC's ranging from .375 to .485. Coupled with the increased OAL capabilities of the VLD magazine it gives the 223 case somewhat more potential for LR shooting/hunting apps. for sure.