The load work up regimen I use is the same as jimbires which I call the "Berger Method." This has worked well for me except in rifles where the throat so long the bullet pushes out of the case before touching the lands.
My .340 Weatherby comes to mind. For this I measured a box of a factory and used the average. This worked fine as I can create handloads that match factory accuracy and speed for a given bullet weight. Interestingly the SD of the factory length to ogive was surprisingly large, but the factory ammunition is quite accurate as expected.
There is something different about a long throat. I think it is how the bullet is supported as it jumps to the lands, but really don't know for sure as I haven't cast the chamber of my .340 and am no expert. Hey it works, whats to fix?
There was a l o n g discussion on Len Backus Long Range Hunting website a few years ago that convinced me to try this method. When I found Berger suggested the same method it validated my opinion of this technique. I have shared this method with a few friends and some have been amazed at the accuracy improvements they have obtained from their handloads.
Even if you have been following the charge weight first then length for years, give this a try if you have a rifle that isn't responding well. You might be surprised.
Statistics: Posted by Whitesheep — Wed May 11, 2016 6:28 pm