I have a little newer Md 99E in .308. I handload for it but did play around with some factory loads. Mine didn't seem to like the higher end 165 grain loads and I had some feeding issues with the pointed or tipped bullets both in the factory and hand rolled variety. It did shoot the Winchester 150 gr. Power points really well and I settled on 150 Grain Nosler Partitions loaded with varget powder. In my experience these older rifles like the mild and mundane loads in terms of accuracy and most of these provide good terminal performance. Even with the guys talking up the 165s, I would follow what the gun shoots. Heed J. Baker's advice and get a couple of boxes of ammo and take the beauty to the range and shoot it. If it were me, I'd shy away from the Fancy ammo with long bullets and look for the tried and true, meat in the pot loads like Winchester Power Point, Remington co-lokt, and the like. Best of luck and when you hammer whatever beast you are pursuing, post a photo and the ammo you used.