Recommended Neck Clearance

[JBO]

I have a .284 with a .313 neck. What is the recommended or preferred minimum, maximum clearance I should have after neck turning with a loaded round? Is it recommended to allow for any thinning of the wall after it's been fired a few times, if so how much?
Appreciate the help.

 

[Scott Harris]

.004 - .006 total clearance in my opinion.

 

[Witchhunter]

Around .002 neck clearance to start. Your necks should get thicker after shooting several times, not thinner. Is your loaded cartridge or your chamber .313? A factory chamber could have a lot more clearance depending on a lot of factors, reamer, brass, sizer die etc.

 

[Immike]

You want .311 or less for a loaded round. 310 would be ideal for the .313 neck.

 

[ShootDots]

Generally speaking, I believe 3K clearance between a loaded round and the inside of the chamber is a good rule of thumb.. However, it has been my experience that a 7mm (for whatever reason) likes 4K or better clearance. It was that way on my 7mm-08's, 7mmMag and now my .284 Shehane... Can you get away with less>> probably, but why?

On the other hand, I have found 6mm's do not mind less clearance. I still get 3K on 6mm's too...

 

[CatShooter]

You want .311 or less for a loaded round. 310 would be ideal for the .313 neck.

What he said.

I first ran my 6mmBR with 0.00075" (3/4's of a thou) total clearance and it was a real princess (nightmare) to live with - I re-cut my cases to 0.003" total clearance and it is a joy to shoot and very predictable.

 

[JBO]

Thanks the information