My 26" 1:12 long-throat Remington shoots 168 SMKs into decent groups at 800 yards. Gets reliably to 1,000 yards even on cold days down here near sea level with the 175 SMKs. Just from the cases of ammo I remember buying I've put 3K rounds of 175 SMK through that rifle, nearly all of it shooting from 600 to 1,000 cards, and all of it being fairly slow factory GMM ammo.
