I am neck sizing for my ar57 but that is a different animal being blow back. this is the first go round with this ammo so I will have to check if the shoulder moves forward more.
so far they are loading and firing great with a noticeable reduction in group size so if the shoulder doesn't keep moving forward with succeeding firing's that's going to be my method for that round. I have always fl sized for auto loaders and levers but at times of being lazy have just neck sized with mixed results. levers seem to be fussier than autos.

the consolidation of the states into one vast republic, sure to be aggressive abroad and despotic at home, will be the certain precursor of that ruin which has overwhelmed all those that have preceded. Robert E Lee
~Molɔ̀ːn Labé Skýla~