Just got my 6xc built and excited!Took a long time goig back and forth between cartridges. Fiannly settled on the XC due to mag length concerns. My smith informed me that his reamer has a .273 neck which he said was snug but not tight. I will be shooting Tubb brass. I really don't want to neck turn. Should I be alright? I guess I'm just looking for reconfirmation. Thanks !