17 February 2012, 07:31
Dave BushOriginal .375 flanged Cordite load?
Does anyone know what the original Kynoch cordite load was for the .375 grain flanged with a 300 grain bullet? Graeme Wright says it was 56 grains of cordite but Taylor says it was 58 grains with the 300, 270 and 235 grain bullets.
17 February 2012, 13:42
GanyanaLoad weights will have varied slightly with different lotts of chordite- and suspect Graeme's scale may be a bit more accurate than John's (although he almost certainly took that figure from a catalouge rather than weighing it himself). Powder also looses weight as it dries out (and chordite originally contained up to 3% water).
And yes, the Brits used one charge weight of chordite for all three bullet weights. Simple system....regulate rifle with 300grn and then co down in bullet weight until you get the next weight that regulates with the same charge. Because The powder had to be inserted before the case was necked down it was a real pain to change settings and the Brits kept it simple.
(after all they made one powder with an intrinsic burning rate similar to 3031 work in everything from .455 revolver ammo all the way through to 16" naval cannon)
17 February 2012, 19:09
Dave BushThank's Don. I hope you have Pierre's new book. He has some great pictures of you in there.
