re: A rule of thumb on changing point of impact on fixed sighted guns

HFP,

quote:

---

I think there has to be a correct ratio for the muzzle flip to affect point of impact. Weight of gun (absorb recoil), shooters grip (absorb recoil), barrel length (time bullet has to escape), velocity of bullet (time bullet has to escape). I believe there is a ratio that once passed, will result in the bullet landing higher or lower.

---

I agree that there are a number of confounding factors, just like you mentioned.

I didn't think about it until last PM, but evaluating this phenomenon would make a good science fair project. (Sorry, but when my kids were growing up we did a total of 20-30 science fair projects.) One could easily find at what muzzle velocity does the slower velocity round no longer hit higher than the higher velocity round. Load rounds in 50 fps increments from 800-1200 fps. Shoot them from the same gun w/ the same sight settings. Post the targets lowest velocity to highest velocity. At some point, the point of impact of the lower velocity rounds will start hitting lower on the target.

quote:

---

Will the same thing happen with a .460 or .500 out of a revolver running around 2000-2200 ft/s?

---

I'm NOT touching that revolver.