RWS centerfire rifle cartridges in calibre 8x57 JS

RWS centerfire rifle cartridges in calibre 8x57 JS

The 8x57 JS is a first-class cartridge for distances up to about 180 m. It is ideal for hunting in the woods and as cartridge for drive hunting. It is also a first-class large game cartridge for Central European game. It is readily used as a universal cartridge there. As a rule, there is less haematoma formation than with rapid smaller calibres

The 8x57 JS was developed from the old military cartridge 8x57 J by increasing the bullet diameter from .318 to .323" (8.08 / 8.20 mm), and an "S" was added to the designation. It was introduced in 1905 and the hunters soon appreciated it.

RWS RWS 8x57 JS HMK 12,1g

Field of applications

Highly suitedHighly suitedHighly suited Red deer, Fallow deer, Wild boar, Chamois, Roe deer
Well qualifiedWell qualified Bear, Elk, Oryx
Suitable Badger, Fox
50m 100m 150m 200m 250m 300m
100m 50m 0.0 100m 150m -4.0 200m -14.0 250m -30.0 300m -54.0
MRD 162m 50m 1.0 100m 4.0 150m 1.0 200m -6.0 250m -20.0 300m -42.0
BC-Value: 0.326

Properties

Type of bullet: Leaded / Leadfree Leaded partial fragmentation bullet
Characteristics Highest performance - irrespective of distance and game weight
Grain Light
Preservation of the game's meat
Different
Stopping effect
Very high
Recoil
Medium
Penetration
Medium
Likeliness of exit hole
Certain
Cutting of hair at point of impact
No

Velocity

0m 50m 100m 150m 200m 250m 300m
mV [m/s] 0800 50755 100712 150670 200629 250590 300553

Energy

0m 50m 100m 150m 200m 250m 300m
mE [J] 03872 503449 1003067 1502716 2002394 2502106 3001850

RWS centerfire rifle cartridge with H-Mantel-bullet

Bullet RWS HMK
8x57 JS

Special about this bullet is its famous H-groove, a predetermined breaking point in the shape of a constriction in the middle of the jacket. It assists the separation of the two projectile cores and is, along with other factors, responsible for the bullet´s dual effective system: the front part bursts very quickly after the impact in the game, produces strong fragments and transfers much energy. The cylindrical tail part separates at the H-groove, penetrates the body even if bones of strong animal are hit, and provides the desired exit hole.

RWS bullet H-Mantel deformation process
RWS hunting bullets deformation process HMK
Deformation process bullet H-Mantel
H-Mantel-bullet

Construction H-Mantel-bullet

 

  1. Geometrically optimized tail for highest precision
  2. Hard tail core for extreme penetration
  3. Softer tip core for controlled fragmentation and high effectiveness
  4. Copper hollow tip for faster response in the game's body
  5. H-shaped constriction for reliable part fragmentation
  6. Modified cannelure for an optimal seat of the bullet
  7. Progressively increasing jacket wall thickness for a mass-stable residual body and a sure bullet exit

Mode of action

Shot on a block of gelatine with a length of 35cm. Shot distance: 100 Meters. Caliber: .30-06

  1. Energy transfer on lightweight game (at 10 cm): 1.193 J
  2. Energy transfer on heavyweight game (at 15 cm): 1.927 J
  3. Total energy transfer: 3.141 J
  4. Maximum energy: 166 at 10 cm
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