Re: To neck turn or not to neck turn?
Many opinions on this subject as you know. I believe neck turing is necessary and will improve your bullet groupings. The way i determine to turn or not starts with sizing. I use rcbs competion dies for 308 and 223. After sizing the casing it goes right to my rcbs case master. There, i check case neck run-out and case neck thickest. If neck run-out is more than .002 and case thickest is not uniform then this casing needs turning. These casings i put to the side to see how many i come up with as only cases that are turned should be grouped together. If all casings came from the same lot then all should be turned so neck pressure will be the same. If the casing did not come from the same lot but have the same headstamp then group these. Always turn before trimming to length. That way your case neck will be true to your cutting head. Hope this helps. Capt kurt