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Old 01-01-2010, 10:58   #9
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Join Date: Feb 2009
Posts: 1,915
IMHO the seating depth variation you are seeing publushed is due to the variable of the bullet used. A Hornady 115grn bullet is or may be shaped diffrent from a Sierra 115 grn bullet. As such the bearing surface and shape of the nose may be diffrent and give you diffrent OAL for the loaded round. I try to load for magazine and function. If the round feeds reliabley and fits the magazine I run it. I try to start with data based on the actual bullet used when ever I can. If it is a Sierra I use their data Hornady theirs, or try to find a bullet that is very similar to what you have and use that. Kedep in mind OAL affects pressure. If you use a fast powder and are near the top of a powder charge/max pressure a small change in OAL could cause a serious pressure problem.
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