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You can use this spreadsheet to calculate the maximum speed of a given bullet to stay within the proposed limit. You may be asked to load or install an active X add on to run this calculator.
You may run the Spreadsheet off line if you have Microsoft excel. You may download it here If you do not have Microsoft excel you can download a free excel viewer just Google for it. Its 10 megs in size. These are the formulas used to work out these figures To work out the joules from bullet weight (M) and speed (V) in ft/sec. E = (M x V² ÷ (2 x 32.1739 x 7000)) x 1.355817 To work out the speed (V) from the bullet weight (M) and muzzle energy (E) in joules V = (√ E ÷ M ÷ (2 x 32.1739 x 7000)) ÷ 1.355817 |
