bigben,
A cousin of mine from wyoming stopped by this morning. He told me that Hornady ammo shot well out of his Hornet in Ruger #1. The Remingtom ammo he tried didn't group well at all. He did note that the Remington ammo he tried was loaded with a heavier bullet than the Hornady fodder. My thinking is maybe the twist rate being used for the Hornet is too slow for heavy for caliber bullets to stabilize. I should have written the bullet weights down that my cousin tried. I believe the Hornady ammo was around 35-37 grains, and the Remington stuff was 40-45 grains. Just something to think about.