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Old May 29, 2006, 01:39 PM   #9
kingudaroad
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Join Date: March 11, 2005
Location: austin
Posts: 735
I have the guage and the comperator that attaches to my calipers. What it does for me is determines the max length I can make the cartridge from the case head to where the ogive touches the lands.

Now I can make a few cartridges that are just short of the lands and then make a few more a little shorter and then a few more a little shorter in small increments.

Now that I have several different lengths I can see which one shoots the most accurately the same way you experiment with powder charges.

I usually do this length experimentation after I have decided on a powder charge.

The way I understand this is I'm trying to time the bullets exit from the muzzle with the most optimum timing of the barrel harmonics, resulting in the most consistent groups.

Although I believe it does make a more accurate round, it's probably not neccessary to be that accurate for hunting applications.

I just enjoy the process of the quest for the elusive one hole group.

Edited after rereading Nicks post...
I can see the problem if using inconsistent cases,but wouldn't this not be a problem if all the cases were uniform? (ie. all new unfired and flr, or all fired once and neck resized only etc.)
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