Unless you have an M1 that ammo will not shoot very accurately. I tried to shoot garrand ammo in my BAR, it functioned well but it is about as accurate as milsurp 7.62x54r ammo.
Greek surplus ammo may be accurate but it is watered down. PPU 150gr 7.62x54 soft point has a velocity of 2,880 fps. PPU 150gr SP 30/06 ammo has a velocity of right at 2,960 fps. Sellier and Bellot 180gr ammo is very accurate and it has a velocity of over 2,800 fps. S&B slams deer and I am sure it would be just as effective on elk and moose at ranges up to 300 yards.
J&G says the Pakistan ammo is berdan primed brass case. I would rather pay a little more for S&B brass. S&B brass is a step above PPU brass. The Paki brass looks like it has already been annealed.