An excellent competition cartridge and good choice for all-around use, the Master M series has a 5.67mm (.223) diameter bullet.
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Lapua Master M Ammunition 22 Long Rifle 40 Grain Lead Round Nose Box of 50 Technical Information Design: Lead round nose Muzzle velocity: 1066 fps Muzzle energy: 101 ft/lb Recommended uses: Target shooting | | ||||||||||