I had a college Calculus professor check my work and he said the math was right.ĬAVEAT: There may be some other good reason (of which I'm not aware) for inputting different twist rates into QL, such as barrel harmonics.

I spent so much time on it because I kept doing the math over and over because the difference was tiny, suggesting you would gain something like three FPS using the slower twist at the same pressure. 458 bullet at 2700 FPS in a 10' twist vs. I wouldn't waste any time changing twist rates in 'gun data.' Years ago I spent the better part of an afternoon calculating how much more energy would be required to spin a 500 grain. I now understand I need to save these changes in a specific way to preserve the default numbers QL came with, for future use in a particular cartridge/bullet configuration.ĭaleGood luck! I'm still learning about QL and consider myself a newb with the program. My intention is to uninstall and reinstall QL, as my altered 'input data fields' in my loaded version have been saved. I will read the manual again now that I have 'played' the program. I now understand I need to save these changes in a specific way to preserve the default numbers QL came with, for future use in a paricular cartridge/bullet configuration.Īny input in my areas of concern would be greatly appreciated!

My final tweak for input will be for 'Friction Proof', as I HBN coat all bullets. I have bullets which are not 'manufacturer' built and believe I have the process of inputting them understood. temps in my area for when loads will be ran. My intent is to alter and save 'Propellants' with temps higher than the default 70 degrees in my propellants file(s) based on avg. I read that twist rate could be factored in under 'Gun Data' but am unsure how this figures into 'Cartridge Dimensions' input box? I want to be to keep my different lots/ headstamps of brass per chamber separated based on 'Max Case Capacity' and believe I have this figured out. I load 204 Ruger Match, 204 AI, (2) 20x47 Lapua, 22 CM and 243AI chambers and with different barrel lengths. I am going to try and get out of QL all that it can offer. Many things I questioned when reading the manual have become clearer as I've perused QL and additional questions have been answered reading thru this thread. My initial intent was primarily for rifle loads but I load for 2 pistols, as well. I read the manual completely and decided I would you it for 'reference' along with reloading manuals until I got thru the steep learning curve. New to this forum but have had QL v.3.9 for about a year now, trying to get thru the learning curve.

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