I read an excellent 3 part series on handloading from the Journal of Mountain Hunting, my favorite part was no. 3 where Darin goes into great detail on the complex topic of load testing and development.
He shows us several ways to develop a good working load using various techniques.
My favorite part is below.
Let’s review some of the key points that will help you evaluate load precision and decide which will produce the best results come hunting season.
This technique and set of processes is one way to go about load development, we suggest doing the load testing first and then fine tuning with seating depth, but everyone can choose their favorite way to get to the end result.
It's well worth read, go here for the full article:
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