A British SMLE Enfield MKI/I in .303 British caliber. I used it to shoot at paper targets @ 200 yds. distance, open sights. The target? They were 8 1/2 inch by 11 inch prints of the Ayatollah Khomeini! The .303 was a respectable round, when shot out of that 8 pound rifle. Easist to field strip and clean, easiest to make safe, too. Remington only sold one load, then, being at best recollection 180gr. loads.