I am new to preparing 6 PPC brass & I am little confused as to what to trim & turn my new Lapua 220 Russian brass to. I have a .270 chamber in my barrel & not sure what to trim & turn to. I plan on expanding the neck on my new brass to 6mm & trim to 1.5 (which most of my new stuff is anyway) & turn the neck to somewhere between .267 or .268 before fire forming. Is this correct? Any advice on initial preparation of this brass would be greatly appreciated.