6bra Necks Looser than other

[Mike Montgomery]

I discovered this while using an Arbor press and Wilson neck bushing dies and seater. There was a variance in seating depths between bullets seated in work hardened brass and brass that hadn't work hardened yet. Seating depth consistency improved after seating the bullet and then rotating the case 180 degrees and re-seating and increasing dwell time. All the brass was neck turned and had the prep. Has anyone else encountered this?
Mike

 

[Coyotefurharvester]

I see, feel, experience this same inconsistency when I load brass that has been cleaned inside the necks. Only brass I clean completely is once fired range brass I collect, just wiping the outside prior to sizing results in smoother seating. Only way around it is some sort of thin dry lube. I do annealing brass after a couple firings, still using cordless drill/torch.

 

[Mike Montgomery]

My conclusions about what was causing the seating depth inconsistencies could be wrong but, it also caused me to pursue other avenues such as neck tension and annealing and paying more attention to producing more consistent reloads. It's an endless rabbit hole!!

 

[Mike Montgomery]

I almost forgot; the other thing that I started doing was to lube the inside of the necks with Graphite.
Mike

 

[MDT6BRA]

I found some Norma brass I had that had less firings on it and tried the same load and seems to be more consistent oal. That leads me to think that the brass is the issue like some of you have mentioned. I have a buddy that has anneal machine and going to try that and see how it goes. I found some alpha brass also and it should be here tomorrow. Thank everyone for the response, great forum.

 

[JackWagon]

I used to get the same issues in my BR. Now I use a FL sizer and then a neck expanding mandrel along with annealing every firing. Issues went away. Until a month or so ago it was just theory then I used a friends arbor press with a gauge on it when seating and could see the reading for each bullet was the same.

Now I do it for every caliber I load for.