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spec'ing a 300 wsm reamer for 600/1000 br

so we have discussed and settled on berger 210's in a 300 wsm.
I am looking at 3.16x coal to keep the bullet(above the boat tail) away from the
case neck/shoulder junction.
BUT what are the current feelings on case neck to chamber clearance ?
I used 2 per side on my 300 win mag and survived.( it shot .31/.32 at 200)
???
thanks
( this is a COMPETITION BENCHREST RIFLE, not a hunting rifle, nor f class)
 
so we have discussed and settled on berger 210's in a 300 wsm.
I am looking at 3.16x coal to keep the bullet(above the boat tail) away from the
case neck/shoulder junction.
BUT what are the current feelings on case neck to chamber clearance ?
I used 2 per side on my 300 win mag and survived.( it shot .31/.32 at 200)
???
thanks
( this is a COMPETITION BENCHREST RIFLE, not a hunting rifle, nor f class)
Mike mine is a 338 neck and I turn to 335. Works great. Troy
 

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your attachments do not open.
that is 1.5 per side
my loaded rounds are .3367/.3369, bullet dia varies a little.
basically a .014 neck thickness and bullets around .3085.
anyone else...
1.5 seems small in todays world
 
674920BC-C568-4A6B-8B46-028CBDBA7025.jpeg
your attachments do not open.
that is 1.5 per side
my loaded rounds are .3367/.3369, bullet dia varies a little.
basically a .014 neck thickness and bullets around .3085.
anyone else...
1.5 seems small in todays world
Then turn it more or go bigger on neck diameter , Simple fix. I just stated what works great for me and shoots small groups with zero problems.
 
Last edited:
.003" to .004" some even run .005"

I just spec'd a reamer for a 300SAUM target / hunter .339" loaded with a .3435" neck, a little on the tight side for a hunter but most use will be casual target.
 
I use .004" neck clearance in my 300 WSM LR/BR chamber. Chamber is .338 and loaded rounds measure .334. Also, don't over look the Berger 215s. My 200 yd 5-shot groups are averaging .3 MOA at 2900 fps. When we have matches again I'll know how well I am tuned.
 

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