6XC Reamer spec question

[ncboiler]

Looking at the Alpha Munitions website they recommend a measurement of .470 to .4714 at the 0.200 line. The reamer print I got from JGS (#1297) for the David Tubb reamer is .4695 at the .200 line. Difference of .0005 if comparing to the lower end of the Alpha recommendation.

Is this significant and what issues would a person have if they used Alpha brass with the JGS #1297 reamer?

I have heard that Peterson brass is going to make 6XC brass fairly soon as well but not sure which reamer it would work best with?

Finally, the .090 freebore is best for which bullets?

Thanks.

 

[Catfur]

I don't know if it's significant but the reamer I got from JGS (per my request) was .4705 at dimension B. And I got a lead (T&V) of .1280 for 105 Hybrids.

 

[tomswede]

I have a CIP spec reamer from PTG. Works well (at least with Norma brass, will try Petersen when it becomes available). Instead of thinking about small differences I went with the standard used by European target shooters

 

[tbeasley]

I have the PTG reamer that is .470 @ 0.200 mark and .090 FB. I use a Redding Type S FL die on Alpha, Norma, Tubb brass. I never had a problem with any of the brass.
I was one of the testers for Alpha on the 6xc brass and can attest that I put 13 firings on the same 6 pieces of Alpha Brass with a basic Redding die and never had bolt clicking issues. The primer pockets were still tighter than new Norma brass.

Btw..use whatever bullet you.want. I use 107smk and hybrids all the time

 

[ncboiler]

I have the PTG reamer that is .470 @ 0.200 mark and .090 FB. I use a Redding Type S FL die on Alpha, Norma, Tubb brass. I never had a problem with any of the brass.
I was one of the testers for Alpha on the 6xc brass and can attest that I put 13 firings on the same 6 pieces of Alpha Brass with a basic Redding die and never had bolt clicking issues. The primer pockets were still tighter than new Norma brass.

Btw..use whatever bullet you.want. I use 107smk and hybrids all the time

Sounds good. Thanks! I have a pile of 105 hybrids so I would definitely try to get those to shoot.

 

[Deton8tor]

I have the same thing as tbeasley has, but a .105FB. I shoot Alphas brass with no issues, great stuff.

 

[Hengehold]

Looking at the Alpha Munitions website they recommend a measurement of .470 to .4714 at the 0.200 line. The reamer print I got from JGS (#1297) for the David Tubb reamer is .4695 at the .200 line. Difference of .0005 if comparing to the lower end of the Alpha recommendation.

Is this significant and what issues would a person have if they used Alpha brass with the JGS #1297 reamer?

I have heard that Peterson brass is going to make 6XC brass fairly soon as well but not sure which reamer it would work best with?

Finally, the .090 freebore is best for which bullets?

Thanks.
View attachment 1049528

Robert Whitley has the answer to your questions on his website 6mmar.com.
Click the tab at the top of his page about the 6xc.

 

[ncboiler]

Robert Whitley has the answer to your questions on his website 6mmar.com.
Click the tab at the top of his page about the 6xc.

Thanks.... found it after I posted the question here. I got a couple of his reamer prints from JGS that helped as well.

 

[DTubb]

Thanks.... found it after I posted the question here. I got a couple of his reamer prints from JGS that helped as well.

FYI.
JGS has never made a reamer for me... Dave Manson has my reamer specs and will freely share them.
I use a .278" neck / .160 freebore/1 1/2 lead -- for DTAC 115's
Base of the case is .4705"

Our 6XC die set is designed to small base and full length resize.

 

[spclark]

FYI.
JGS has never made a reamer for me... Dave Manson has my reamer specs and will freely share them.
I use a .278" neck / .160 freebore/1 1/2 lead -- for DTAC 115's
Base of the case is .4705"

Our 6XC die set is designed to small base and full length resize.

Wasn’t Hugh Henriksen involved with you when you first designed your 6XC?

 

[DTubb]

Wasn’t Hugh Henriksen involved with you when you first designed your 6XC?

absolutely -- Hugh is a fantastic reamer maker.. don't get in a rush.

By the way -- JGS makes great reamers also they just haven't made any 6XC reamers for me. Had some JGS reamers in other calibers.

 

[Curious]

FYI.
JGS has never made a reamer for me... Dave Manson has my reamer specs and will freely share them.
I use a .278" neck / .160 freebore/1 1/2 lead -- for DTAC 115's
Base of the case is .4705"

Our 6XC die set is designed to small base and full length resize.

.278" seems quite a large neck diameter, I guess your not neck turning?

What do you feel is the best neck clearance?

Thanks

 

[urbanrifleman]

I tell you the truth the 6XC seem like a total winner of a cartridge, it appears to do most everything well. I bet it would be a great PDog or Ghog cartridge with about .030" FB for 80 to 55 grain bullets.

@DTubb you should move the shoulder down 1/4" in the die and make a run to replace the Dasher

 

[spclark]

@DTubb you should move the shoulder down 1/4" in the die and make a run to replace the Dasher

That would be a 6xD then, right?

 

[urbanrifleman]

That would be a 6xD then, right?

6xc minus

 

[urbanrifleman]

Has 6XC always had a small primer? If so, Is it better with a small primer?

 

[atombomb]

Has 6XC always had a small primer? If so, Is it better with a small primer?

I've used converted Lapua Palma brass from Clownbuster and Norma brass from David, I thought I had better ES/DV with the small primer, but accuracy out to 600 was similar.... now I have a 1000yd range to shoot at, so I'll do some more testing..

 

[Hengehold]

Has 6XC always had a small primer? If so, Is it better with a small primer?

No. It is traditionally a LR primer case based off the 22-250 which is LP. The Norma brass is LP.
-T

 

[spclark]

Frustrated by short case head life in the Norma-sourced 6XC brass years ago (when I could FIND any!) I started making 6XC cases from Lapua's Palma brass about the time it appeared on these shores.

Lots of work but worth it; consistent accuracy equal to or better than the LRP version and case heads hold up.

Tried making 6XC from their more recent 6.5 Creedmoor too... works well, less hassle than using Palma brass as source. That endeavor's on hold though, I've only made ~ 100 cases & fired about 30 once back in 2016.

I know David tested SRP's early on, decided LR worked better. I've always wondered if maybe the current crop of primers (including the Russian-sourced Murom Plant products I like but that sadly have become unavailable here) may be better than what he had to choose from back fifteen - twenty years ago?

I believe both Peterson Brass and Alpha Munitions may be making 6XC now with both LR and SR primers, but don't hold my feet to the fire if that's not actually true.

I have SRP 308 brass from both outfits. Both look great but I haven't shot either one enough to know how they hold up compared to Lapua's Palma brass.

 

[spclark]

I had a rifle built by Carl Bernosky in 2008 on a Quadlite action. He used a Hugh Henricksen reamer with the profile described in the drawing attached. I bought a reamer from Hugh a few years ago for another barrel for my CG INCH action with the same profile: