6x45

[bj139]

I shot my 6x45 today at 100 yards.
Two groups one partial resized and one full resized.
55gr Dogtown bullets, 25gr H335, COAL same as factory 223.
[ATTACH=CONFIG]10912[/ATTACH]

What does all that vertical stringing mean?
Horizontal spread looks good on partial resize.

After letting this rattle around in my head a while I realized I had never had vertical stringing like this always shooting the same way.
The reason has to be elsewhere. The inconsistent neck dimensions after firing may be the key due to inconsistent neck tension.
This is military, range pickup brass I used.
Military brass is not designed to be reloaded, so it may be quite stiff for best bullet retention and may need to be annealed to provide consistent neck tension at this point.