Neck turning after neck sizing?

[Edgecrusher]

Hey guys. I'm not new to reloading but have sort of a newb question for you. I used the search function but couldn't quite find exactly what I was looking for. I'm loading for a 300 WM and an 8mm Mauser right at the moment. I am seriously looking at the Redding type "S" neck sizing dies that use the bushings to wring some more accuracy out of my rifles via neck tension. My question is, if the bushing dies squeeze the case neck down from the outside, this pushes any irregularities to the inside of the brass yes? If this is the case, would I be wasting my time trying to outside turn the necks of said cases? I apologize if this is an ignorant question but I just can't seem to wrap my mind around neck turning a case if the outside of the neck was just trued up by the bushing in the die? Any insight would be greatly appreciated!

 

[GreatGonzo]

Re: Neck turning after neck sizing?

You use a mandrel to push the irregularities to the outside, then turn to true up the brass. Then you can accurately adjust the tension by using different sized bushings. Turning is more about concentricity than neck tension.

 

[Jerkface11]

Re: Neck turning after neck sizing?

The type S dies come with a sizing button just use it the first time and neck turn.

 

[former naval person]

Re: Neck turning after neck sizing?

Some folks say, and it seems reasonable, that pulling the button through the neck can make the case alignment worse...the slop in the open face case head holder allows "cocking" of the case as it is pulled out of the die. Several companies...Sinclair and K&M...make a mandrel holding die that allows expansion of the necks by pushing the mandrel into the clean and lubricated case mouth. Since the ram and case holder bottom are supposed to be square with the press the neck will be expanded in line with the body and base. Then turn the outside of the neck. JMHO