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+--- Thread: Dram equivalent back-calculating (/Thread-Dram-equivalent-back-calculating)
Dram equivalent back-calculating - srjdsmith - 08-23-2023
Ok, here’s what I know: dram equivalent gives you an idea of the muzzle velocity of a shot charge. It compares smokeless powder to the performance of black powder. A 3 3/4 1 1/4 denotes a shot charge of one and one quarter ounces exiting the muzzle at 1,330 fps. It’s the old “high velocity field load”. Therefore a 3 1 1/8 is one and one eighth ounces of shot moving at approx 1,200 fps. A 2 3/4 1 1/8, then, is the same one and one eighth moving at approx 1,145 fps.
What I don’t know is how to back calculate a load, say 1 1/8 ounce load at 1,000 fps. Is that a 2 1/4 1 1/8 (approximately)? Anybody got dope on how to do this?
RE: Dram equivalent back-calculating - Snake46 - 08-23-2023
Be happy to answer if I ever, and I have no hope, understand the question..