Jim, Thanks for your reloading course, very well done. I have, as you have read everything under the sun and reloaded for 40+ years. I find doing a Ladder test for seating depth is the single most important thing in accurizing a new rifle. First I pick the bullet I want to shoot then I seat it at the different depths in my ladder test, every gun will be different. I do this before I ever do a accuracy test with different powders.
I’ve found seating depth testing to be important for some vld bullets and of very little change in some other bullets.
Tell me more about your test. Are you shooting a group at each setting? How many depths are you checking, and how far apart?
Hi jim,
I normally do a group of 5 rounds at .005 difference in every seating depth. I use a Hornaday gauge to find my overall length. I then start my test at 20 thousand’s back. I shoot accubond LR and find its a different depth in every gun that hits that sweet spot. My groups will go from a scattered 3" mess down to a refined 3/4" group then i work on the powders and refine it more.
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