WebJun 5, 2005 · How close is the Greenhill formula when applied to grease grooved lead bullets, as I understand it is based on jacketed bullets, I have 2 40 cal .408" rifles one with a 20" twist and the other a 22" twist. the 22" twist shoots well with a .835" long bullet and also a .925" long one . WebNov 4, 2024 · The Greenhill Formula is an “empirical formula” in that it took a lot of data points, and tried to describe them using math.
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WebDec 1, 1976 · The Application of Greenhill’s Formula to Cable Hockling J. Appl. Mech. ASME Digital Collection Volume 43, Issue 4 December 1976 Previous Article Next Article Research Papers The Application of Greenhill’s Formula to Cable Hockling F. Rosenthal Author and Article Information J. Appl. Mech. Dec 1976, 43 (4): 681-683 (3 pages) WebThe classic Greenhill equation is T' = 150 / L' where the twist and the bullet length are in calibers. Removing bullet diameter from twist and length gives the equation often found: … flojet suction wand raspberry pi
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WebAug 15, 2024 · The Miller Formula. Don Miller developed this formula as a more accurate way to find an ideal rifle twist rate. Whereas Greenhill was more of a generic formula, Miller’s uses more characteristics of a rifle … WebDec 3, 2010 · To apply the Greenhill Formula using the original 55 grain bullet yields the following, for one brand of full metal jacket (FMJ) military type bullet measuring .647″ in length. The bullet diameter is .224″, which … WebThe formula to determine the correct rate of rifling pitch for bullets of usual construction (lead alloy or jacketed) is known as the "Greenhill Formula". Step One: Determine the length of the bullet in calibers. (Bullets length in inches divided by the bullets nominal caliber). Step Two: Divide 150 (a constant) by the bullets length in ... great life at woodlake