Neck thickness for 284 shehane

I'm getting ready to turn a large number of pieces of brass for 284 shehane. Lapua 6.5x284 expanded up. Measures about .0145 after expanding.

My reamer neck is .317.

I'm planning to turn to .013" neck, giving a loaded round of a calculated .310 and .007" neck clearance.

I know this sounds kindo loose but I anneal frequently so I don't anticipate any problems with the necks sealing.

I had problems with tight neck clearance once on a 6slr that drove me crazy so I like to go loose.

Anybody have experience that screams "too loose"? I could go to .0135 or so to get a thou back. .014 would probably work.

--Jerry

 

I turn them .0135 with a .317 chamber.

 

I personally run, and tell my customer to run at least 0.004" total clearance (0.002/side) on all calibres over 6mm. I have found when less than that, I get unexplained shots out of the group. I find this works very well especially in F Class guns where you're shooting off the ground.
Matt P

 

I run a .307” brass in a .313” chamber. No problems so far

 

We loaded to those exact same dimensions for years: worked great. Now we do no-turns with .320 necks.

 

I run these exact dimensions with -0- problems.

Lloyd

 

I would assume all of you are using Lapua's 6.5-284 necked up. Anyone going to give the Peterson 284 brass that was just released a try?

 

I run Norma

 

I run Lapua cardboard box, when I run out I’ll be switching to Peterson brass.

Lloyd

 

I've got almost 4,000 cases of Norma brass. When I run out I'm going to switch to St. Peter's brass.

 

Right after i ordered 600 lapua, peterson introduced 284 brass. I am using peterson for my 6mm shooting right now.

Thanks for all the replies. I've got 590 of them to turn but I adapted my neck turner to the lathe and am getting excellent results.

--Jerry