by Hoot » Tue Feb 18, 2020 11:46 am
Not precisely related but an interesting parallel. About 9 years back, I plated some Barnes XPB bullets with HBN, which is commonly used in bottleneck calibers for benchrest shooting. The velocity went down, confirming the importance of resistance to movement down the bore in order to keep the pressure optimal. Now those velocities didn't change in quantum leaps and bounds but they definitely went down on average. That was using a 20" 1:24 twist, chrome lined Bushmaster barrel.
Hoot
In Theory, there is no difference between theory and practice. In Practice, there is.