Or a powder substitution
A 3 Dr. Eq. load of “E.C.” No. 1 or “Schultze” was 42 grains by weight. Upon introduction, 3 Dr. Eq. of Dense Smokeless Ballistite was 24 grains; Infallible 22 grains. (Later the powders were equivalent)
Substituting a Dense Smokeless powder for Bulk Smokeless powder would double the charge. It has been estimated that 50 grains of Infallible or Unique could reach 30,000 psi - which is where Bell's damascus and Vulcan barrels ruptured.
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