30br how much neck clearance?

[skeetlee]

How much neck clearance should i have with my brass in a 30br .330 neck? Is .002 not enough? Does it hurt to have a little extra wiggle room? Any experience is appreciated. Im going to turn some brass so i need some solid info. I figured .328 but i didnt know if the 30's shoot a bit better with say a .327 turned case with a .330 chamber Lee

 

[tiny68]

I turn to so my loaded rounds are 0.3285 to 0.3288" at the pressure ring in my 0.330" neck. My chamber cast shows my neck is actually 0.3302". I am happy with 0.015" clearance. Lots of guys run only 0.001" clearance. Just make sure you measure at the pressure ring when the bullet is seated. Luck with your 30BR. Tim

 

[skeetlee]

tiny thanks for the info. I am a bit surprised however. I always thought the 30br needed more room than that. Much appreciated Lee

 

[tiny68]

Some do and some don't. Nothing wrong with running 0.001 to 0.0015 clearance as long as you have good QC. I don't know anyone that runs 0.002" or more under on intension, but I don't know that many shooters. I have 0.330, 0.0332, and 0.333 necks and I run the same 0.0010-0.0015" clearance on all. The 0.333 neck has some brass that loads to 0.3305" simply because I couldn't get it to clean all the way up with 0.0015" clearance on all brass so I took another 0.001" off. Maybe others will give input. tim

 

[hawghunter]

Skeet last last year i use .002 and did ok this year before my mentor past away we turned our necks for .004 clearance, and have done a lot better a 250-23xs last shoot at bridgeville, so you could turn a few thinner and try them if it don't work you are out a few cases worth a try Mark