2-piper:
I was of course referring to the plug gauge pre-1910 German, old English method of identifying the diameter by the number of lead spheres of the same diameter which when their mass is summed together would equal 1 lb. The plug gauge equation has a Y = X^3 type dependence. I now see that a plot of the plug gauge equation might be beneficial. I've seen many pics of flats with "181" for 0.303" British and the lowest plug gauge number I've seen in print is "184,11" for "7,5 or 7,6 mm". Jani's drilling is the lowest number caliber and highest plug gauge number I've seen. Now I'm not saying they equate just that the plug gauge designation/pre-rifled value is found for a specific caliber. I'm going to calcuate the values down to 6mm, or maybe lower, and see if there are other integer values. I don't think bullet technology regarding jackets was too advanced and the jacket was thin and possibly soft.
Kind Regards,
Raimey
rse
Last edited by ellenbr; 12/17/08 03:10 PM.
