Interesting thread. I'm leaving Tues for CO first season elk. Developed a load for my 308 - 150 TTSX @ 2850 and MOA. Im also taking my trusty 280 AI with 160 Fed Trophy.
I've been watching and asking those using monos in various SA cartridges. Run the ballistics on a 308 using a 150 TTSX at 2900 which is doable in a 308. It shoots way flatter than it would seem. If you really want to defy logic, compare a 300 Win Mag shooting a 200 gr Partition and the aforementioned 308/150 TTSX. The 308 shoots about as flat, bucks wind about as well and loses 6-700 ft/lbs to the 300 WM - if that means anything. For reference, a 22 hornet churns up 700 ft/lbs. A 150 gr bullet that retains 100% of its weight is the same as a 230 gr bullet that loses 35% or a 200 that loses 25%. The only compromise I see is that the TTSX needs 2000 ft/sec. The 308 is still moving at 2000 ft/sec, at elk altitudes, out to 500. At lower altitudes, it drops below 2000 at about 450. The 7-08/140 is about identical.
I have an either sex tag and intend to report on how well the 308/150 TTSX worked. It wont be for lack of trying
