Neck turning the .308

[Ross308]

I got some very good feedback on my last post. I needed advice on neck sizeing only after fire forming the brass in my rifle. I was going to turn the necks for uniformity thinking this had something to do with neck tension. Now I'm reading posts about no neck turn chambers and the slight to no advantage of neck turning. Wouldn't the case thickness have to be the same on all brass to maintain the same tension and wouldn't this effect accuracy? If not, then I'm set to go with what I've got. Thanks for any input.

Dan R.

 

[boogershooter]

Most shooters dont turn the .308...Im not sure why. Is it a custom,tight)neck chamber?

 

[TheSilverFox]

Most shooters dont turn the .308...Im not sure why. Is it a custom,tight)neck chamber?

Because lapua brass is of very good quality and the accuracy advantage of neck turning is not noticeable.

 

[jr600yd]

Neck turning is common practice when reloading for a rifle with a tight neck. It is still done on cases fired in a 'no turn neck chamber'. Aside from making the necks all the same thickness there is another advantage and that is in reloading the case. When using standard dies,not neck bushing dies) like RCBS and others. The sizing die,or neck die) squeezes the neck down to minimun size then the expander ball opens the neck up to X diameter. This is the point where a lot of case stretch comes from. You can feel this when the expander ball comes out of the case neck and you get added resistance, some times you'll hear a squeaking noise. By neck turning, either cutting the neck wall to a known thickness, or knocking off the high spots, you allow some room for the case neck to expand and not stretch the case as much. What this translates to is in theory your cases should last longer provided your dies are set up correctly.

 

[glo]

Not that I’m an expert but I turn all my necks of all my rifle cases; both target and hunting. I feel I have improved my shooting by taking this extra step. I wish I had done an experiment on turned necks verse non-turned necks. It would have been nice to see if there was really any difference.

One thing is for sure, a lot of brass,1 to 3 thousandths of an inch) comes off one side of the neck if not most of the neck.

 

[Ross308]

Thanks for the advice on pros and cons of neck turning. I think I'll go with turned necks if for no other reason then consistency. It just seems that this would ensure more uniform neck tension which should tighten up the groups, at least a tad. Need every advantage I can get.
Thanks again.

Dan R.

 

[deadlyswift]

not to long ago I was considering turning the necks on my factory chambered 220 swift for the same reason. so I asked around about it. everybody told me there is no need to neck turn unless you had a tight neck chamber. I was surprised at what I was hearing, but the guys I asked have been in the game for a long time. there advice was to get a good redding type s bushing die. So this is the way I went. It did work very well. the bushing die allows you to have control of your neck. I replaced all my dies with the redding type s bushing dies. In my 308 the run out is down to .0015 and it really made a huge difference. I love the redding type s bushing dies!