Typically we look for about .002" crush from the ID of the case to the OD of the bullet. I start with that formula but usually use the sense of feel when you seat the bullet and look for smooth firmness but mostly consistency. The more consistent you are round to round the lower your ES will become, meaning your groups will tighten up. Problem is the more you shoot the cases the more hardened the brass gets so they start to vary slightly, now that leads to annealing them all. See what we mean, its all tied together, but the key is consistency. We don't know your rig or your load or your reloading techniques so you might need to start somewhere else first. Just curious what kind of accuracy are you getting now, is it not good enough for you? Do you need to change things?
