New Build 6XC or 6 Dasher

[daddaman]

Looking to do a new build for 1000 practice and occasional competition shoot for fun. Any insight into which would be a better choice? Will use a Lone Peak Fusion Ti action most likely on a manners stock with a Benchmark barrel. Thanks for any insight.

 

[Justice1327]

I say build an XC...no drawback from my experience. Dasher is great, but the XC gives more velocity (if that is your thing...at 1K yrd it cant hurt) and you can use the new Berger 120 LRHT bullet to really get the most out of the system.

 

[Hydra6]

Dasher is the easy button today. Lots of Dasher barrels, supplies, etc. I have been running 6 Dasher for years.

That said, I just bought a 6XC reamer to have a new barrel cut to try the Berger 120s for PRS.

Whether 6XC or Dasher, need a barrel cut by someone who understands the unique cartridges. Neither has a SAAMI specification so lots of different reamers with unique throats and freebores which can lead to problems.

 

[daddaman]

Dasher is the easy button today. Lots of Dasher barrels, supplies, etc. I have been running 6 Dasher for years.

That said, I just bought a 6XC reamer to have a new barrel cut to try the Berger 120s for PRS.

Whether 6XC or Dasher, need a barrel cut by someone who understands the unique cartridges. Neither has a SAAMI specification so lots of different reamers with unique throats and freebores which can lead to problems.

My gun smith is pretty proficient (does a couple hundred barrels a year) and is an F class shooter,. He recommends the 6XC as he loves his and shoots it out to 1 mile. What reamer are you using? and what should I avoid? We typically use PTG reamers and I buy all my reamers for my rifles. He did mention the 115DTAC and the new 120 Bergers. Any isnight is greatly appreciated. Thanks in advance

 

[4g64loser]

In a push feed gun, I vote xc. In a CRF action, less relevant.

The xc feeds like a fat chick at the buffet from unmodified aics 308 mags. I have one on a Nuke action. Running 115vld bergers. Still young but shoots in the high .2s.

Not what I'd pick for PRS but for a belly match steel smasher or F Open it's Definitely a solid pick. Longer neck gives more projectile choice with a given reamer. Dasher (or my BRX) you need to decide what you wanna shoot pretty specifically before you pick your reamer.

You can comfortably run heavies in the 2900 plus velocity range (I assume you will use a 24 to 28in bbl) without pushing pressures or you can really sling them if you want to lean on the powder measure a bit and don't mind losing some barrel life.

 

[Hydra6]

My gun smith is pretty proficient (does a couple hundred barrels a year) and is an F class shooter,. He recommends the 6XC as he loves his and shoots it out to 1 mile. What reamer are you using? and what should I avoid? We typically use PTG reamers and I buy all my reamers for my rifles. He did mention the 115DTAC and the new 120 Bergers. Any isnight is greatly appreciated. Thanks in advance

I bought a Manson reamer from Tubb as David Tubb was the inventor of the 6XC so I bought the reamer with the Tubb spec. The biggest issue with "bullseye" like target sports is they sometimes spec super tight chambers, etc. for ultimate accuracy but they can be a pain with all kinds of vudoo about brass prep such as neck turning. If you look at 6XC reamers you will see a lot with very tight necks.

 

[jamie eaton]

So if some of you could enlighten me as I have been pondering the same . I have a savage model 99 250 3000 so Im familiar to the parent case of the 6xc . I am aware that the 1920s savage is not a 1000 yard gun but with the new 25 calibers that are out with the high BC's why does the necking down to a 6mm make a better round ? This is not meant to derail or be annoying , I have had this stuck in my head since Mr Tubb has passed !

 

[Hydra6]

If you want to run a heavy high BC projectile in 25 or 6mm - need a fast twist barrel. There are some other tweaks around chamber etc. but the 6XC uses a fast twist barrel to launch heavy high BC projectiles. You can look on David Tubb webpage for history of 6XC. Same with 25 - if you want to run the 130 class of high bc projectiles you need fast twist that traditional 25 caliber rifles do not offer (yes can be done custom).

 

[jamie eaton]

I figured the twist was the issue . It would be just like me to build something similar for the fun of it . I would love a faster twist barrel for my 220 swift !

 

[Hydra6]

Fast twist can = bullet blowups too

 

[4g64loser]

So if some of you could enlighten me as I have been pondering the same . I have a savage model 99 250 3000 so Im familiar to the parent case of the 6xc . I am aware that the 1920s savage is not a 1000 yard gun but with the new 25 calibers that are out with the high BC's why does the necking down to a 6mm make a better round ? This is not meant to derail or be annoying , I have had this stuck in my head since Mr Tubb has passed !

While accurate on the general pedigree of the case, the current brass uses a 308 rim spec and case head.

6xc case has a taper similar to a 308, which feeds easily from magazines (desirable both on High Power, which was Mr. Tubbs undisputed forte, and in more modern events such as PRS and NRL. After having attempted to modify aics mags to feed 22 250 reliably, I can confidently state that the xc is better in this regard.

Now let's talk case capacity. The 250 savage with a 115gr pill has around 40gr of usable capacity. Based on some quick Google fu, RL19 will be compr3ssed at about 36gr. I can.say that RL19 in the xc under a 115 compresses around 40.5 to 41, depending on which 115 and what reamer. Just a guess as inhave not done it but I'd venture to guess that a 250 case would probably push a 135 (if throated to allow longer seating and not eat up too much case capacity) around 2500fps. The xc can push a 115 VLD, dtac, or RDF into the 2950 range with ease. If you don't mind pushing pressure, you can go higher.

 

[4g64loser]

Fast twist can = bullet blowups too

Just ask the guys who were shooting 6.5-284 with orange box bergers.

 

[Hydra6]

I run 134/135 in 25x47 at 2740 with 26 inch barrel, 25GT similar. Can run faster in 25 Creedmoor

 

[Hydra6]

I ran 6XC with 115 DTACs at 2950 with 26 inch barrel - that was common