5.6x57mmR
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The 5.6x57mmR cartridge was created by RWS in Germany for hunting small deer. There are no dimensional or ballistic differences between the 5.6x57mmR round and the 5.6x57mm round (q.v.) other than that the former is rimmed.
[edit] Specifications
Bullet diameter: 5.56 mm (.224") Loads: 74 gr @ 1040 m/s (3380 ft/s) 60 gr @ 3700 ft/s