Originally Posted by desertbull
So, if I have a load that is very accurate but shows SLIGHT pressure signs (slightly sticky bolt lift about 50% of the time and very slight primer cratering) I could seat a little deeper and possibly lower the pressure a little?
In theory, yes. Though maybe not enough to change the pressure signs you're seeing, Depends on where you're seated now and how much over pressure you actually are.
Where are your bullets seated now? Jammed, Kissing, or Jumping? If not kissing then how far are they jumping or how deep are they jammed? Do they feed in magazine, are they deep enough in the case that you've got at least
a 1/2 caliber down inside the neck?
Perhaps that rifle really really likes the seating depth you've already got and changing that could decrease accuracy some. But, won't know till you try it.
That is something you could easily try before dropping the charge just a hair. I've gone back later and seated bullets deeper in loaded rounds many times. Alot of times, just a 1/4 grain decrease in powder does the trick too. Changing to a cooler primer sometimes does the trick. Also, keep in mind that some rifles just plain shoot their best at or near max pressure.