I keep reading that *generally* speaking, cast bullet accuracy begins to deteriorate after 1800-1900 fps or so. Of course there are many exceptions to this, with good accuracy being achieved with both faster and slower velocities.
What is the main limiting factor [ or factors ] with achieving j-bullet velocities with GC cast, in a 14" long barrel?
Assuming GC cast boolit fit, hardness and lube is optimum, is the accuracy limited by the amount of pressure needed to get the cast to equal j-bullets?
Why do I want to match J-bullet speeds with cast?........I just know somebody is going to ask........
Because I want to.