Neck sizing vs full length

Hello,
I have recently purchased an older bench rest gun from a gentleman who competed years ago with it. It is the old 6x47mm or 6-222. He gave me two sets of dies for it. One has a wilson seater which works great and what he said was a wilson neck sizer built off the reamer. It is not marked wilson. The other is an old lee zero error set. The problem is that the "wilson neck dies puts no tension on the bullet (I can pull the bullet by hand) The lee seems to work great but Im sure wasnt built off the reamer but I do get proper tension. I ordered a set of full length rcbs dies and I am tempted to just full length size every time. I ordered them to be able to size 222 mag. What will I be missing by full lengh sizing? Am I correct that to resize the 222 mag. I should lube the heck out of it and push it through the sizer? I dont compete but of course I want to get the best groups I can.
Thanks,
Richard
 
The 6x47mm or 6-222 neck die may need a bushing of the correct size?? If a bushing type die? A set of full length rcbs dies for the 222 mag. will need to have the body of the case lubed, no lube on the shoulder & neck area. Lube inside the neck also. The neck will then be sized to hold a 22 caliber bullet, not 6mm.
 
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