jgilesg wrote:Thanks for the information Hoot.
One, maybe dumb, question. What is the web?
"the diameter just above the web should not be over .5015."
JG
If you look down in an empty case. The area where you see the flash hole is the front of the web. Generally speaking, its the area that is solid brass which surrounds the primer. Case head growth is usually most obvious where the case wall meets to the web. It is the "weak link" in the chain. It is also where case head separation occurs in the event of a failure.
SAAMI Spec for that portion of the case which just so happens to be the widest point is .5000 and the chamber is spec'd to .5010 in a perfect world. If you set your micrometer (not caliper) to .5015 and let the case drop through, if it passes through, it passes. You can also order a gauge from Tony. No two chambers are cut the same due to wear on the reamer. Find what
your chamber likes by running through your cleaned, resized empties. If they're getting long in the tooth, you will find a few that won't drop into the chamber without a little help. mic those and you will see what diameter to cull your cases at. Write it down in your cookbook for future reference. I check my cases each time I resize them. It is really inconvenient to have to pry your action open on the firing line. I've had to tap with a brass rod down the barrel (not safe) with one hand, while prying the action with the other hand. Awkward! Now, I just cull them in advance.
The peanut butter jar is also the recipient of cases that have grown shorter than 1.685 (OK to use a caliper here). Think about it. The taper crimp relies upon the case length to impart the same degree of retention from one reload to the next. A lot of the velocity SD observed in this caliber with lighter bullets is due to not sorting your cases by length. I usually group them within a few thousandths of each other, when I'm loading my tray full of re-primed cases, ready to go. IE 1.685-1.687, 1.688-1.690, 1.691-1.693, etc. Not important for blammo-ammo though.
Sorry for turning this into a chapter from "War and Peace".
Hoot
EDIT:I am work and it took me a while to type this. Longer than your search.