Originally Posted by Firearrow
Ok I have either 2.625 or 2.642. It's friday and lets have some fun. Who votes for 2.625, and who votes for 2.642. I am to new at precision reloading to have an informed opinion. So what does everyone think.
where did you get 2.642 ?
ok , I see . Gene said he trims .005 - .010 shorter than SAMMI
I was a little afraid to push the clearance that much . that's why I have .025 . in the article Tres says to just trim short of this measurement . looks like I'm still trimming to much .it will take you awhile for all the brass to grow to this measurement while all being trimmed to an even length . here is the article clip .
To use a gauge like this:
1. Thoroughly clean your weapons chamber.
2. Take a scrap case and trim it WAY back with your case trimmer, say .050" SHORTER than book spec.
3. Seat your plug gauge into the case - long.
4. Ease this round into your weapon and fully close and lock the bolt.
5. Remove the case gently without bumping the gauge. It has hit the end of the chamber and be pushed back into the case by the action of locking the bolt.
Measure the overall length of the case, head of the case to end of the plug, and note that measurement somewhere obvious and permanent in regards to loading for this particular rifle. It would probably be a good idea to repeat this measurement three times and average all three readings.
Now until this dimension changes (barrel removal, etc.), trim your brass just short of this measurement instead of “book trim to” specs.
Once we have our cases all trimmed to a uniform length for our specific rifle we now need to deburr the mouth of the case.
here is the article link