R37.F – 5.7x28mm – 37 Grain Fragmenting Copper – 50 Rounds


This round is designed to fragment upon impact. Five-seveN penetration depth of 12-14in in ballistic gel + 4 layers of denim.

In stock

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SKU: rws-r37-f Category:


R-SERIES: 5.7x28mm DUTY/CARRY [R37.F]

  • 37gr Expanding Copper HP
  • CNC Machined Pure Monolithic Copper 99.5%

Projectile Behavior:

  • Violently expanding/fragmenting tip with deep penetrating base. Base penetration 12-14in & petal penetration 5-7in in ballistic gel + 4 layers of denim.


  • PS90: 2,503 FPS
  • P90: 2,362 FPS
  • FsN: 2,107 FPS

Use only in firearms that are in good condition with caliber markings that exactly match this ammunition. Store all ammunition in a secure, cool, dry area separate from firearms. Keep ammunition and firearms out of reach of children and unauthorized/prohibited persons. Read, understand and follow the instructions found in your firearm owner’s manual. Always follow established firearms safety practices and protocols including the use of eye and hearing protection while shooting. Discharging firearms in poorly ventilated areas, cleaning firearms or handling ammunition may result in exposure to lead and other substances known to cause birth defects, reproductive harm and other serious health risks. Have adequate ventilation whenever discharging firearms. Wash hands thoroughly after exposure to firearms or ammunition. Because reloading practices are beyond our control, R&R weapon systems disclaims all liability for any damage, injury, or death that may result.