6mm BR reamer JGS-1262

[HTSmith]

I'm going to give them a try, just ordered two boxes of 50 from Graf's. I'll torture test a few pieces to see how long the primer pockets will hold up. Been wanting to do this for some time now and this is a good time to try them out.

Do keep us posted.

 

[Mulligan]

This with a .274 nk

Yes, for the brass I have.

CW

 

[Mulligan]

Lapua 6BR brass (2022) out of the box with a Berger 108 @ pressure ring; OD measures .269.
My best shooting 6BR has a .2435 FB diameter, .272 neck, no neck taper.
disclaimer: fwiw it is my best shooting 6BR by default cause it's the only 6BR reamer I have ever used.

What is the FB in your improved BR?
CW

 

[newbieshooter]

What is the FB in your improved BR?
CW

Spec-wise - It looks to be a pretty standard 6BR (not improved):
FB is .105

 

[Fire Dog]

I'm in need of a new 6mm BR reamer. Looking for a no turn this time around and was just wondering if anyone shoots this JGS 1262 CIP reamer and what they think of it? I don't see anything out of the norm that looks bad about it except the .001 tapered neck. View attachment 1462510

That chamber has been a winner for me and now on second barrel with it.
I compete in F Open even against the 7mm's and have taken out club class for the year...
It has let me shoot a 200.14 at 600yds and regular sub 3.5" at 300 meters.
Peterson brass, CCI 450's, 29.3gr AR2208 {Varget} and 103's Hbn coated & .007" jam.
That bullet weight seems to be a perfect weight for the caliber though have previously used 107 Sierras {the 103 are made with Sierra jackets}, never could get various types of 105 and 108 Berger's to perform.... All out of a Benchmark 28" 1:8T barrel on an Eliseo R5 chassis.

 

[SKWERLZ]

my peterson brass is .268 loaded round, just purchased first batch last month, lot #NO66B

My Peterson brass is the same .268 with a 107SMK.

 

[urbanrifleman]

My newest 6bra is 160 fb. Which is ideal for 105-115. There is no downside to a bit of extra freebore in a 6br.

A Dasher is typically AT LEAST 140 fb (usually more) and people marvel at how they shoot, but people freak out at a 140 plus 6br.

I decided on 160 fb because the 6xc Tubb is 160, and we have found that to be ideal for 105ish bullets. The 6xc has the same neck as a 6br... The 6gt also has the same neck and I think it's 140 fb also.

I find no annealing necessary with longer freebore as the donut and increasing stiffness has very little effect. Not to mention a bit of case capacity never hurts.

 

[Jim Mc]

My newest 6bra is 160 fb. Which is ideal for 105-115. There is no downside to a bit of extra freebore in a 6br.

A Dasher is typically AT LEAST 140 fb (usually more) and people marvel at how they shoot, but people freak out at a 140 plus 6br.

I decided on 160 fb because the 6xc Tubb is 160, and we have found that to be ideal for 105ish bullets. The 6xc has the same neck as a 6br... The 6gt also has the same neck and I think it's 140 fb also.

I find no annealing necessary with longer freebore as the donut and increasing stiffness has very little effect. Not to mention a bit of case capacity never hurts.
View attachment 1463040View attachment 1463041View attachment 1463042View attachment 1463043View attachment 1463044

Nice comparisons of bullets and the .160 FB. I have a A.W. #1 .272nk BRA reamer with .104fb that works well with 80's to 103's. the JGS 1262 has a .094 and may play better with the 68's and work with the 103's.

Jim Mc

 

[Jim Mc]

That chamber has been a winner for me and now on second barrel with it.
I compete in F Open even against the 7mm's and have taken out club class for the year...
It has let me shoot a 200.14 at 600yds and regular sub 3.5" at 300 meters.
Peterson brass, CCI 450's, 29.3gr AR2208 {Varget} and 103's Hbn coated & .007" jam.
That bullet weight seems to be a perfect weight for the caliber though have previously used 107 Sierras {the 103 are made with Sierra jackets}, never could get various types of 105 and 108 Berger's to perform.... All out of a Benchmark 28" 1:8T barrel on an Eliseo R5 chassis.

It's good to hear this standard JGS 1262 reamer is working well for you and on two barrels.

Jim Mc