Hey everyone--
It seems like if the following variables are known, there should be a way to mathematically estimate at least a ballpark figure for best accuracy of a given projectile:
- Alloy/hardness
- Boolit weight
- Boolit caliber/diameter
- Barrel twist
I realize other factors go into this too (boolit profile, length, powder coat vs lube, gas check, specific gun, etc. etc.). But a good example of this is my Mosin Nagant 91/30. I read in multiple places that shooting cast boolits through the Mosin, I would find my best accuracy in the neighborhood of 1800 FPS. My own testing and load workup confirmed this, and my Mosin is now capable of shooting at least 2 MOA when I'm having a good day, using a load that I haven't chronoed, but mathematically comes out to just shy of 1750 FPS.
Right now I'm working up a load for the Lee 105gr .358" SWC boolit in my M&P 9. Is there a formula or calculator I can use to estimate where my accuracy node will be, given that I know the alloy, weight, diameter, and barrel twist?