Hello there fellow casters.
I am trying to design a 147grs bullet that will chamber in CZ pistol chambers or other "short throated / no freebore chambers"
Now, to do this I need a reasonable amount of bearing surface on the bullet. Too long will force me to set the
bullet very deep in the case to make it chamber smoothly. The result of that is that there will be very little spare room for powder.
Too little bearing surface, and the bullet will in theory not be as accurate.
All bullets will be cast with hardball alloy BHN 15-16
How does one calculate or estimate how much bearing surface is actually needed? Reckon that bullet length comes into play ofcourse..
Is there a set of ground rules? Mathmatics? Witchcraft? Or is it a "much as possible" kind of deal. What if as much as possible is too little?
Anyone With some good input regarding this matter?