I had Short Action Customs here in Ohio chamber my 6XC barrel and it shoots the DTAC 115 RBT lights out. I used the same reamer as DT recommended except that I went with a .140 freebore. He recommends a .160 freebore so that is what I will switch to the next time around although a .140 freebore works great with the DTACS. As for DTs pre loaded ammo I purchased 100 rounds three or four years ago and found it to be a little slow. Below 2900fps. I load my handholds to 2950 fps with 40.0g H4350. I use Norma brass . Hope this helps. David also has a Facebook page that you should check out. It's listed as "TUBB original 6XC run by David Tubb". He also has another page listed as "David Tubb Adaptive target rifle owners group" which you might find interesting.
Below is a post by DT off of his Facebook page which should help you.
"Putting all of this together so it is easier to read and to help others understand. I shoot the original 6xc. Not the 6xcII- not my design.
Strictly my opinion and what works for me but here is what I use for original 6xc.
I do know people successfully using .140 freebore for 115s. That being said,
For 6xc reamer I use a .278 chamber neck diameter .160 freebore (straight section) and 1.5 degree lead.
The reason I use a .278 neck is it allows the bullet to center itself more easily and the carbon buildup isn’t an issue after several rounds. I also don’t want to neck turn anything.
Dave mansion makes the reamers for the 6xc. Just double check with him on those dimensions listed above. His phone number is 810-953-0732.
[email protected]
2.780” is close OAL measurement for a new chamber.
I like to try shooting 115 DTACs with a either a .010” to .020” jump or .010” seated into the rifling.
My load is 39.5 grains of H4350 using the coated DTAC 115s achieving velocity of 2950fps
I use norma or Peterson brass and the Tubb 6xc sizing dies from superior shooting systems and have had no problems in the many years I have shot the 6xc
Use a thin layer of imperial sizing wax on the neck and body when reloading brass
I also use Schneider barrel 1:7 twist 5P rifling. At least 26 inches if not longer
Primers for
6XC
LRP—S&B
SRP — Rem 7 1/2
Common questions: With the .160 freebore, can you still run the 105’s & 107’s and still hit the lands?
Answer: Yes - you can hit the lands. When using a 107 gr bullet it will be contained by approx 2/3 of the case neck.
This part is written to provide further insight to the 6xc. First off -- I designed the 6XC cartridge so I speak with authority--
I recommend using a .278" neck diameter -- .160" lead (straight section) and a 1 1/2 degree lead.. this is designed for a 115 DTAC RBT bullet.. these dimensions will also allow the user to shoot 105/107 grains bullets and still employ approximately 2/3 of the 6XC neck length for the lighter weight bullet support.
A piece of new Norma 6XC or Peterson 6XC brass is designed to have a .468" cartridge base diameter..
The back of a 6XC chamber is .470"
The base of a piece of fired 6XC brass RESIZED using the A7 tool steel die from Superior Shooting Systems measurers .469" or a few ten thousands less when resized. The 6XC Norma/Peterson is effectively small base sized leaving clearance between the outside diameter of the resized case and the chamber of your rifle. I recommend you small base and full length resize ALL cases no matter what the caliber.
This resize die also uses interchangeable integral neck shoulder bushings which COMPLETELY resize the neck and set back the shoulder. ALL other 6XC resize dies, which all came to life after I invented the 6xc , use just an interchangeable neck bushing, leave a portion at the bottom of the neck unsized.
Here is the rub -- the Superior Shooting Systems resize die has been around since about 2005 and works without peers.. ALL the others came along at a later date... to my knowledge NONE of them are designed to small base size a piece of fired 6XC brass..(In my opinion this is typical of commercial die makers).
When you don’t size the base with enough reduction in diameter then there isn’t enough clearance for the brass to expand/contract when fired. It is basically all but forced into a your rifles' chamber base and has inadequate room to expand (and contract) when fired hence the sticky bolt lift. The base of the case drags against the chamber wall when the bolt is lifted..
The 6XC is a CIP case (European SAAMI).. it is a very popular case in Europe.
Alpha 6XC Brass is not designed to work in an original 6XC chamber. It is designed for the 6xc 2 which has different dimensions and not my design. This is stated on their website when one clicks on alpha 6xc brass under “description”. (Update: I have been told that if one has brand new alpha 6xc brass and runs the new brass through my TUBB® 6xc resize die before firing in an original 6xc chamber it should work. I have not tried this myself since I only use Norma or Peterson brass.)
Please do not assume the reamer print posted on the alpha brass website for 6xc is my design because it has my name on it. It is not my reamer print. (update: after sending a letter explaining the confusion my name has been taken off of their reamer print)
There seems to be a lot of confusion on the web and I hope this post helps.
Manson 6XC print I use shown below.
FYI —Tolerance ranges on diameter can be used .001” larger per drawing"
