Zippy
I was up at Tomball all morning, and out with my Grand Daughters tonight, so I just saw your post.
What I do is load Lapua 220 Russian cases with enough 133 or similiar burn rate powder up to the neck shoulder junction, and seat a cheap 22 caiber bullet. I then apply a very thin coat of sizing wax to the body, and fire it in a 6PPC barrel chambered with my chambering reamer. (.269 neck). What comes out is a Factory, non neck turned Lapua 6PPC case, if there was such an animal..
I then trim to length, turn the necks, (a breeze with the .269 neck), load them with a full charge of 133 and what ever 68 grn bullets I have, and fire them in my Rifle. They are now ready to go to the line.
A couple words of caution. Do not use a good barrel for the 22 caliber bullets. I am not sure if they will hurt a good barrel, but it sure won't do it any good. And, when you shoot them at the range, aim somewhere in front of the target, as the bullets are less than stable when fired in a 6mm barrel.......jackie