Der Ami, I appreciate the input.
On shooting the right barrel on the right bull and left on the left bull makes great sense.
I have read two schools of thought on resting the gun between shots, one concurs with you that both barrels should be shot then an extended period for cooling. The other is just shoot it. While it makes some sense to me let the barrels cool down at the same time I like to think the guns are not so delicate that it makes a great difference.
I measured the fired brass internal case mouth dimensions and they ran from 0.428 to 0.431. I continue to wonder what the hell on bullet bore dimensions. This might lead me to think I need a bigger than 0.423/0.424. I went back and remeasured the muzzzle and the casting of the chamber, and barrel slug
Muzzle is still 0.429 the bore slug 0.427, and the chamber cast at the end of the forcing cone are 0.426. I am beginning to question my measuring tools and there ability to consistently read. That or my technique bites, and or all of the above. Part of my challenge is meauring the lands versus the grooves (Yes I realize this sounds stupid) I was measurung groove to groove versus rolling the casting and getting the land to land.
In checking what bullets will slide into the fired brass the 0.427 seem to just barely slide in the .430 stuff does not. I have discovered that even unresized bullets in the same box can vary 0.002+-.
I am nervous about increasing the bore dimensions of the bullets I am loading as it could effect pressure significantly.
I checked the dimensions on the expander and determine it is 0.435 so it may be oversized
Last edited by old colonel; 07/16/13 11:05 PM.
