I've never shot any of the large primer Remington brass, so this is hearsay. :a26: Most of us reloaders prefer the small primer brass (Hornady, SSA, Federal and S&B) over the large primer Remington brass due to perceived higher number of reloads with the small primer stuff. I believe the main reason is because the large primer pockets tend to get loose after fewer reloads than the small primer brass, especially when shooting hotter reloads. Since you've already got the Remington stuff, just shoot it and reload it as long as holds the primer. :a08: