Interesting as those values seem small when compared to some of the advertisments. On the 25/35, 30/30(I don't think was of Winchester origin)-0.30WCF & 30/40, the last value must have been a max value or some semi-smokeless/non nitroglycerine one if not black. On the 0.30 U.S. Army-30/40Krag most loadings are approx. 1/3 less than 40 and when 40 is used, the pressure approaches a value greater than 42k psi and considering the early rifle receivers were case hardened and not really heat treated, trouble was on the horizon.
It was around the time of you Hercules catalogue, circa 1915, that Du Pont replaced the MR(Military Rifles) powder series with the progressive burning IMR(Military Rifle Powder).
Kind Regards,
Raimey
rse
Last edited by ellenbr; 01/03/09 02:52 PM.
