R,

I will read the info in more detail later. For now, I will say that your info from Al is in regards to barrel time. I don't dispute it. Its physics.

What is missing is whole body motion of the rifle under recoil. You can have a faster load with a higher POI due to the greater recoil (mo' motions of rifle), barrel time or not. Very common with handguns where heavy bullets hit at the same point as lighter bullets. Longer barrel time with the 300gr vs. 240gr. but the overall recoil of the firearm points the barrel higher on the heavies. Have seen this with rifles too.

And barrel harmonics happen mucho fast. It rings like a bell once the primer goes off. In other words, before the bullet even gets anywhere near the muzzle.

Al is a varminter, and his findings *might* be geared towards light recoil, low weight bullets. I'd be happy to discuss in more detail, but give me a chance to review.

Jason

Last edited by 4th_point; 03/08/14.