mtngun wrote:Tom buys into the "bands-stripping-in-the-rifling" theory of what limits cast bullet accuracy. I tend to disagree. I think my experiments with Loverider bullets have demonstrated that even itty bitty bands are able to hold the rifling without stripping.
...However, it is a fact of physics that an unbalanced bullet -- and I assume all cast bullets are imperfectly balanced -- will wobble, and the faster they spin, the more they wobble
LBD wrote: I don't think the amplitude of the "wobble" increases with an increase in RPM but the frequency probably does.
The 270 test rifle used in this book has a Douglas Premium barrel with a throat half cone angle of 0.75 degrees, which is about half that of a factory throat. This should ease the entry of the bullet into the throat and reduce bullet deformation. The only proof of this is that this rifle starts out being a little more accurate than a normal factory rifle, and the shallow throat angle plus a chamber centered on the bore axis are the main difference.
Users browsing this forum: No registered users and 1 guest