Neck diameter for 308 Win

[jpretle]

For those of you who are running a 308Win in competitions, what neck diameter do you use? and what brass are you running?
Are you running that neck dia to accommodate the brass?

 

[ballison]

Had a new barrel put on a FTR rig, and used a reamer from PTG with a .3412 neck. I'm using Lapua brass turned to .015" thick. I probably wouldn't have had to turn them to fit the chamber, but I live in PA and I've been bored with all the crappy weather. My loaded cases measure .3375 and I use a .336 bushing.

**Correction. After reading Savageshoot's post, I measured my loaded rounds rounds and they are .336". The .3375" is what they were with my old chamber when I didn't turn necks. I still use a .336 bushing because I find that Redding bushings tend to size necks about .001" less than the printed size. Redding says this is from a funneling effect, so I take it into account when I buy bushings. This is for a F-T/R rifle, so the .001 neck tension I get is perfect.

 

[savageshooter86]

My chamber is 0.342". I run Lapua brass I neck turn to give me a loaded round of 0.336"
**Only turned necks to help give uniform neck tension**

 

[Mr. Ten-X]

.336" loaded.....004" clearance in neck. Lapua necks turned.

 

[tclaunch]

.344" ND is ideal for a no turn chamber with Lapua cases. .050" freebore for 155 Sierras and .090" freebore for 155 Lapua and 175 to 185 class Sierras and Bergers.

 

[Chappy]

loaded rounds run 0.335 0r 0.336, have to look at my notes. Lapua brass. .340 chamber neck. 0.002" clearance on each side of a loaded round.

 

[Keith Glasscock]

I run Winchester brass with a .335 neck. .003" clearance total.

Amazing how long brass lasts if you don't abuse it...