MODERATOR: 6mm UBL?

[SHall]

I saw where Jerry Tierney was shooting a 6mm UBL at the NBRSA Nationals. Is it any different from the Dasher? I know the Dasher has a 40% shoulder and blown forward .100. I had a 6mm BRBS,Bill Shehan's improved version of the 6BR) at one time and it was blown forward .120 and a 40% shoulder. It had a slightly shorter neck than the Dasher. Just wondering where the 6mm UBL falls.
Thanks, Samuel Hall

 

[Forum Boss]

Sam,

This is basically a Dasher developed by Grant UBL for Cross the Course Guns. Grant found that some brass wouldn't chamber with a .272 chamber neck, so he ordered a .274 -- or that's the story I've been told.

I would have to compare Dan Dowling's original reamer with the JGS 6mm UBL reamer to tell you if there are other differences.

 

[reloader243]

Not to side-track the thread, but in reading it I had a question about 6mm rounds. I'm shooting a .243 AI .270 neck and using it for 100-1000 yd local shooting,friendly fire, not competition yet)I use a 1x8" 28" Shilen bull throated for 105-115gr. I was interested in the 6BRX and the Dasher.,several versions I guess).Is there any advantage,one over the other) in any of these, or is it a matter of personal choice? It sounds like they may be more barrel friendly than a .243 or .243 AI.
thanks for any and all user's comments. New to this sport,but now I'm hooked.

 

[Forum Boss]

Big advantage of BRX is:

1. You can use normal 6BR dies for neck-sizing and bullet seating.

2. Body taper is same at .308 or .243, so you can use a .308 die for full-length sizing.

Advantage of DAsher:

1. Might be very slightly more efficient than BRX so you might,maybe) get a little more velocity.

2. Brass looks good and is VERY stable once fire-formed.

A Wilson Seater can be reamed with chamber reamer to create a custom bullet seater for the Dasher. Hornady will make a custom FL Die for $90 or so, and Redding makes Dasher dies now--so the BRX advantage is mainly being able to use Dies you may already have.

 

[Rustystud]

If one makes a pair of .098 washers the 6BR dies don't have to be adjusted. They can be set and locked. Then just add or remove the washers between loading the BR and BRX.

Both the 6BRX and Dasher are superior to others because of inherit accuracy, availability of good brass to fire form, lower cost of shooting, ie: components, both brass and barrel life are superb. Neither have any significant recoil and are a pleasure to shoot. They both fit a standard boltface action and shoot well in a neck turn or no neck turn version.
Rustystud

 

[butchlambert]

Eric,
What in the 'ell is bull throated?
Butch

 

[memilanuk]

'bull barrel, throated for...'

 

[butchlambert]

Thanks Milanuk, I have heard of a "bullbarrel" and guess it is a varmint weight barrel, but not a bull throated barrel.
Butch

 

[IdahoSharpshooter]

I believe the Dasher has the shoulder blown forward .2 inches.
After a lengthy analysis, and a lot of help from this forum, I am building one.

butchlambert was kind enough to help me out by selling me one of his old 6PPC barrels I could have chambered to fire form my brass. It will let my gunsmith chamber both it and a new Bartlein barrel. I think by time he paid to ship it he made about enough $$$ on the deal to get he and his wife a cup of coffee at McDonalds. Maybe...

 

[flatlander]

My first Dasher bbl was done by Randy Gregory using Grant Ubl's reamer. It was a Krieger med Palma 1-8tw fitted to my Nesika K Palma rifle, and was the most accurate LR rifle I'd ever owned at that time. When I bought a lathe & started doing my own barrel work a year later, the first reamer I bought was a PTG copy of Grant's 6mm Ubl. The body is blown forward .100", just as with other versions of the Dasher, and it has the same 40* shoulder.