Fired and unfired brass--any correlation?

[WV1951]

I have never had to bump the shoulder or full length size my 223 brass. I neck size only and need to trim the OAL only very occasionally. Works the brass less and it lasts longer. I do anneal occasionally, usually after a dozen loadings or so, but I have failed to see any difference in groups size after doing it. But then I'm not known for shooting consistent bughole groups

The takeaway here is to not work the brass anymore than you have to. Set your FL die to only bump what you need to get the fit you want, and use the barrel's chamber as your guide.

Thanks. MY SIL just left with the h4895, a box of 69s and a box or 60s along with a thousand CCI 400 primers. He will do a ladder test for me, so when the weather comes around, I'll give it a shot.
With no negative comments, my chamber must be fine. The only caveat is that I have no doubt the rifle shoots much better than me.