rugerjunkie
Buckeye
Posted this question over at the shooters forum and want to pick the brains of the experts here too...
Ive been making some 221 fireball brass. I ordered a set of forming dies that work like a charm after trying without much success using the 221 dies to do the forming. All is good and cant be much simpler with the new forming dies.
I run the brass through the forming dies , trim , champfer and deburr , anneal the new neck and shoulder , then make a final pass through the 221 sizer die. I have done 2 batches. One with Lake City brass and one with Federal FC 223. All of my measurements are the same between the two.
My main question is about the necks. I measure .011 neck thickness and from all the books I have , it is right on. I took a fired case from my rifle and measured the outside neck diameter , then a dummy round with a new reformed case with a bullet seated and it measures .004 larger diameter than the fired case. The dummy rounds function fine in the rifle and those measurements should give me enough chamber clearance with the new rounds right?
The way im figuring this is a .004 diameter gives .002 clearance in the chamber plus you have the fired case that has shrunk back down a tad after firing which should equal adequate clearance in the chamber to not cause any pressure issues. If wrong , please correct me.
Thanks,
Jeff
Ive been making some 221 fireball brass. I ordered a set of forming dies that work like a charm after trying without much success using the 221 dies to do the forming. All is good and cant be much simpler with the new forming dies.
I run the brass through the forming dies , trim , champfer and deburr , anneal the new neck and shoulder , then make a final pass through the 221 sizer die. I have done 2 batches. One with Lake City brass and one with Federal FC 223. All of my measurements are the same between the two.
My main question is about the necks. I measure .011 neck thickness and from all the books I have , it is right on. I took a fired case from my rifle and measured the outside neck diameter , then a dummy round with a new reformed case with a bullet seated and it measures .004 larger diameter than the fired case. The dummy rounds function fine in the rifle and those measurements should give me enough chamber clearance with the new rounds right?
The way im figuring this is a .004 diameter gives .002 clearance in the chamber plus you have the fired case that has shrunk back down a tad after firing which should equal adequate clearance in the chamber to not cause any pressure issues. If wrong , please correct me.
Thanks,
Jeff