6.5x47Lapua chamber reamer...what dimensions?

[CdnHotshot]

I'd like to order a new chamber reamer for 6.5x47LAPUA
Intend to primarily shoot 120-130gr.
I've read that .294 is the smallest recommended and .110-123 is best freebore for these bullets...then is read that .292 is ideal with about .160 freebore.....then I read it's best to order zero freebore to allow the gunsmith to oput it at any measurement.

SO, what is it !

 

[Jason Boersma]

If your going to order a reamer the best way is to make up a few dummy rounds at the seating depth you want with the neck diameter you want and send them to the reamer maker so he can make one the way you want it.

 

[ShootDots]

I'd like to order a new chamber reamer for 6.5x47LAPUA
Intend to primarily shoot 120-130gr.
I've read that .294 is the smallest recommended and .110-123 is best freebore for these bullets...then is read that .292 is ideal with about .160 freebore.....then I read it's best to order zero freebore to allow the gunsmith to oput it at any measurement.

SO, what is it !

If you want COMPLETE clean up of your neck, from neck turning your brass, either a .292-.293 will force you to clean the necks up nicely. That means a 12 thousandths neck wall thickness. That will net you out a .288 loaded round. Assuming you don't get EXACTLY 12 and maybe "end up" with 12.5K neck wall thickness, you will have a loaded round "depending on the exact neck wall thickness", about .288-289. My preference is, as far as freebores go, even a 123 Scenar needs at least a .130 freebore to keep the bearing surface / pressure ring above the neck shoulder junction. My preference for a 6.5 x 47 freebore, for the 123 / 130 bullets, is a .135, My preference is a .293 neck. Turn the necks down to 12K, or VERY close, and you will have 4K+ clearance>>>perfect!

 

[buddy.223]

Just got my new 47 back, smith used a .294 165f/b pacific t & g reamer for the 120-30 bullets ive only been shooting the 123 scenars so far and i have an oal 2720 and 2176 to ogive, the bullet with a 10 thou jump looks to have a perfect bearing in the case.

 

[highlife]

I went with a 143 Freebore,291 Neck,1.850 chamber Its worked very well for me with the 130 VLD

 

[TimP]

I sent a dummy round to JGS with a 123 Scenar seated with the heal of the bullet .030 North of the shoulder neck junction. The reamer print came back showing .1647 FB for that bullet as seated. I ordered my reamer with .170 FB a .290 neck as I prefer a little more than a good cleanup and a chamber length of 1.8550. My loaded round with an unturned neck measure out at .29055 - .29110 with the 123gr Scenar and Lapua brass.