Small, medium, and large Inline Bullet Feed Magazine. Works with .220 to .463 diameter bullets, 22 Cal to 45 Cal. Small Inline Bullet Feed Magazine works with bullet diameters .220 to .273. 22 CAL, 24 CAL, and 26 CAL. Medium Inline Bullet Feed Magazine works with bullet diameters .300 to .372. 30 CAL 35 CAL Large Inline Bullet Feed Magazine works with bullet diameters .390 to .463. 40 CAL 45 CAL Mfg: Lee Precision