HS-6 is a fine spherical propellant (for) pistol and shotshell. In pistol, 9mm, 38 Super, 40 S&W and 10mm Auto are some of the cartridges where HS-6 provides top performance. In shotshell, HS-6 yields excellent heavy field loadings… Identical to Winchester’s discontinued 540.”

Bottom line: Still evaluating.


  • Good amount of load data.
  • Very fine grains, meters well.


  • Very dense powder (a grain takes up little space) making double or even 3x charges possible.

Density (per Lee dipper chart) 14 grains/cc

Redding 3BR Pistol Insert

pistol_insert_number ≈ 5.44 * Grains – 1.8

Grains Thrown ≈ 0.33 + 0.184 * pistol_insert_number

Pistol Insert # Grains Thrown 10x Throws (Grains)
20 4 41.2
40 7.7 77.8
46 8.8 ???
50 9.5 96.0

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