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6XC

Life is short. Why wait? 5 minutes to swap a barrel.

:)

Like I like to say, I try to provide barrels at a price that you don't have to get married to them.
All I need is the vise and the action wrench, maybe some gauges. I've done a terrible job of taking the time to shoot my rifles. I even have a 200 yard range and made myself a concrete shooting bench at our house...
 
I love the 6XC. My favorite cartridge of all.
I have been shooting them In hybrid type target/hunting Rifles for around 16 years. 1-8 and a 1-7 twist. Norma and Peterson brass.
It’s absolutely the Best. A lot of people maybe don’t know this or don’t care. If you’re a shooter, you care. It works in a standard short action 2.800. With the bullet above the neck shoulder junction. This was a major factor in making the 6XC. The creed is a little too long. You need a med length action modified magazine ect. All the stuff that leads to the bullet being pushed too far into the neck, bad. The creed will never be a 6 XC. It’s just perfect for what it was intended for and that makes it just so easy perfect for everything else.
 
My 1-7.5 Twist Rifle shoots everything Between the 80 gr. FB Berg. and 108 grain, Bullet's,.. very Well,..
But sometimes. I Wish that, I Had, a 1-9 or, 1-10 twist Rifle to, use for strictly, smaller Varmints / Targets with, 60, to 75 gr., Sierra/ Berger's & V-Maxes, etc. ( Stuck with, my .22-250 for, Now ) LOL !
Yep. That's why I went with the 1:9 on my hunting rifle. Shoot everything from 58s up through the 100s.
 
I like the 1-8 for everything. I shot 65 V max to the 105 HVLD. I had a reduced load with a 65 V max at 1,500 fps for squirrel hunting. It was a lot of too much Rifle for that. I use a 223 with a 42 gr Calhoon at 2,500 FPS now or a 22LR. I settled for the 105 HVLD for everything big and small. I don’t have to mess around with different loads except when low on RL17 and I have to use H4350.
I had GREAT success with a 115 HVLD in a full 1-7 twist. Quite impressive. Even shot some 105’s in it. It short small testing saw no difference but I expect there was. I sold the 1-7 to a guy in Texas. He was so happy with it he called and wanted all the specs ect so a few of his buddies could build one exactly like it. That actually was what was called the 6XC II chamber. I was under the understanding it was based off a dimension that D Tubb was using. It was a little bigger neck dia and a longer free bore. I saw no difference in it between my tight chamber that I had to my specs. Although I was able to push the 115 HVLD to 3,150 fps with RL26 with incredible accuracy and case life.
IMG_0496.jpeg
 
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I like the 1-8 for everything. I shot 65 V max to the 105 HVLD. I had a reduced load with a 65 V max at 1,500 fps for squirrel hunting. It was a lot of too much Rifle for that. I use a 223 with a 42 gr Calhoon at 2,500 FPS now or a 22LR. I settled for the 105 HVLD for everything big and small. I don’t have to mess around with different loads except when low on RL17 and I have to use H4350.
I had GREAT success with a 115 HVLD in a full 1-7 twist. Quite impressive. Even shot some 105’s in it. It short small testing saw no difference but I expect there was. I sold the 1-7 to a guy in Texas. He was so happy with it he called and wanted all the specs ect so a few of his buddies could build one exactly like it. That actually was what was called the 6XC II chamber. I was under the understanding it was based off a dimension that D Tubb was using. It was a little bigger neck dia and a longer free bore. I saw no difference in it between my tight chamber that I had to my specs. Although I was able to push the 115 HVLD to 3,150 fps with RL26 with incredible accuracy and case life.
View attachment 1625385
The xc2 is a touch larger at the base, and is intended for brass formed from 308 brass
 
Yea I don’t remember the exact specs. I had my reamer made by. JGS. I think it was .0005 bigger at the 200 mark. Can’t remember the NK dia but bigger dia. 169FB maybe. I shot Norma brass but did have the matching Redding dies to match the reamer. I had no problems. Honestly the changes using matched dies, I never noticed anything different. My first chamber I actually had the reamer made tighter at the 200 mark. My thinking was tighter primer pockets with HOT loads. I can’t remember the NK dia but it’s a min clearance over a loaded round. I think I went .003 over. 105FB. I should have that reamer around someplace. I looked for it one day briefly and never found it. I sold the XCII reamer. I really doubt you would actually notice too much difference IMO.
 
Well I have heard some controversy over the 6XC II chamber. I actually know nothing about it. There was a good article that used to be on 6mmar.com. It was how the chamber was developed. None of this information is available anymore , that I can find anywhere. I was under the understanding that the dimensions were developed by D Tubbs. It was an advancement of trial and error and dimensions that he felt worked better. I remember nothing about 308 brass. So after reading that article being I had a 6XC with a min clearance chamber that I spec’d to what I wanted. This 6XC II chamber was completely in the opposite direction but I figured if D Tubb was using it I was game to try it. I bought the reamer dies ordered a 7 twist and headed to my favorite smith. This is all I know of it. I will tell you I shot nothing but Norma XC brass and 115 HVLD’s It worked exactly as the article stated. I really honestly saw not much difference in my tight chamber other than it was a little bigger.
I have talked to D Tubb on the phone I’ve bought brass and bullets from him and at that time I don’t think we talked about that chamber. I did see he had some reamers on his site. I know I have 500 DTAC’s bullets I’d like to start shooting. I know D Tubb has posted on here before. So IDK but it seemed to me. To my knowledge what everyone thinks the 6XC II chamber is. Is not what it was when it came out and I chambered that barrel. My guess 10-12 years ago.
Plus to make 6XC from 308 brass is way too much work. Takes forever. After all the cutting. Expanding. Neck turning. Fire forming. Then they all need annealed or they split next firing. So yea I doubt it had anything to do with 308 brass.
 
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Ok I found this. So .0014 bigger in the web .200 mark. .276NK 164 FB. Really not far off from what Tubb’s site is saying he recommends. Tubb’s site says .470 at .200.
.278NK. 160FB. So really not a big deal off either way.
My chamber is .4695 at .200. .274NK I believe the freebore is .104. I can’t find the print or the reamer. But the NK is stamped on the barrel and I remember I tightened the web because I’m a BR shooter and it was hard for me to do big chamber dimensions. lol.
 
Well I have heard some controversy over the 6XC II chamber. I actually know nothing about it. There was a good article that used to be on 6mmar.com. It was how the chamber was developed. None of this information is available anymore , that I can find anywhere. I was under the understanding that the dimensions were developed by D Tubbs. It was an advancement of trial and error and dimensions that he felt worked better. I remember nothing about 308 brass. So after reading that article being I had a 6XC with a min clearance chamber that I spec’d to what I wanted. This 6XC II chamber was completely in the opposite direction but I figured if D Tubb was using it I was game to try it. I bought the reamer dies ordered a 7 twist and headed to my favorite smith. This is all I know of it. I will tell you I shot nothing but Norma XC brass and 115 HVLD’s It worked exactly as the article stated. I really honestly saw not much difference in my tight chamber other than it was a little bigger.
I have talked to D Tubb on the phone I’ve bought brass and bullets from him and at that time I don’t think we talked about that chamber. I did see he had some reamers on his site. I know I have 500 DTAC’s bullets I’d like to start shooting. I know D Tubb has posted on here before. So IDK but it seemed to me. To my knowledge what everyone thinks the 6XC II chamber is. Is not what it was when it came out and I chambered that barrel. My guess 10-12 years ago.
Plus to make 6XC from 308 brass is way too much work. Takes forever. After all the cutting. Expanding. Neck turning. Fire forming. Then they all need annealed or they split next firing. So yea I doubt it had anything to do with 308 brass.
In the infancy of the 6xc, there was no consistent supply of norma xc brass. Most formed brass from 22-250 brass, which was the original parent case. Some guys started forming brass from 243 and 308 brass. This lead to clickers and stuck cases, as the brass would be too tight at the base. This led to the revised 6xc2 reamer, which alleviates the problem.
 
Well I have heard some controversy over the 6XC II chamber. I actually know nothing about it. There was a good article that used to be on 6mmar.com. It was how the chamber was developed. None of this information is available anymore , that I can find anywhere.
A lot of what you seek is in this document written by Tubb.
 

Attachments

Yep,. That's,.. the GOOD info ^^^ right there !
I shoot, a Version ONE, Tubb Design, Norma or, Peterson Brass and Forster, 6 XC Dies = NO, "issues" !
SADLY, in the early Days there WAS, a Ton of, Confusion !
Version 2 was to, get RID of, "Clickers" from making, 6xc Brass from, mixed Brands of, .22-250 Brass.
 
Yep I read all that. IDK I was able to get Norma XC brass a long time ago. Before most people even heard of the cartridge in the mainstream. I bought brass from D Tubb
I actually think. Originally they were being formed from 22/250 and most shooting the cartridge in competition didn’t want to buy the Norma brass. I had it back when like nobody heard of it. What I’m saying is the difference between .0014 or even .002 is very small in reality. Not like it’s a different cartridge. I am running .2695 .274NK and 104 freebore. I due have a very slight click. It doesn’t bother me and to me it makes no difference. I know some hate it. Can’t have it all. I doesn’t bother me, doesn’t effect accuracy and has never effected my brass.
After having the bigger chamber I honestly saw no difference in accuracy. Which as a BR shooter was difficult because everything was tight neck. Tight body dimension. I shot fitted necks long ago. So I would absolutely chamber another barrel with the reamer I have now. If I was to get another reamer I would definitely go with Tubb’s specs and not be concerned. Although my dies work really well with the chamber I have now.
 

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