6 dasher reamer?
- Thread starter Shane8820
- Start date
sparky123321
Silver $$ Contributor
FYI there are a few of these brand new 6 Dasher(Rem) PTG finish reamers listed on Ebay for $66. Ordered one for myself.
Ramblerman
Silver $$ Contributor
That price decided the caliber on my new rifle...I'll make it work, hahaha
sparky123321
Silver $$ Contributor
$150-$175 shipped.
You won't need to turn necks. Freebore is very common and will work fine but does NOT get the neck/shoulder junction clear of the bearing surface of a 105 hybrid. It will give you room to chase the lands though.
Base diameter of .4708 is a bit small, you will need to use a tighter Harrell's die like a D4 for sizing or you will get clickers.
sparky123321
Silver $$ Contributor
Easy enough to increase the free bore after it's chambered if you need to.
ridgeway
Silver $$ Contributor
Sure is with right tools and skills.
sparky123321
Silver $$ Contributor
And you can just rent the Uni Throater.
You won’t have to turn necks with this reamer as it actually shows a .273” neck diameter.. The .200” line of .4708” is on the smaller side and as recommended above will probably need something like the Harrell’s D4.
Ramblerman
Silver $$ Contributor
I did some measuring on the base of some brass...and rounded to the nearest .0005"...
6mm Br Lapua brass (old gold box)-.469"
7mm Br Remington brass-.4685"
6mm Dasher Norma brass-.4680"
In my case, buying this reamer provided me some options...
Given the length on the Norma Dasher brass, I could stuff the reamer in another .050" and try to further "improve" the case and then not have to trim them down about .045". But, fire form vs. trimming, we'll see. Probably just end up trimming...it's simpler!
I have an old 22 BR with the Remington chamber (why I have 7mm BR brass), so now my search for brass that will fit that chamber may have ended, though forming will be required, it saves me from buying another reamer before that barrel is shot out.
Just my thinking, which is often wrong. Be safe , Kevin.
Here is the one we use and I've used it on my gun. Had no issues with it.
Even made a ammunition pressure test barrel for one of the ammo makers. They said every time they shoot that barrel all they could do was smile. So one of the ballistic lab guys had to build a 6 Dasher.
Later, Frank
Even made a ammunition pressure test barrel for one of the ammo makers. They said every time they shoot that barrel all they could do was smile. So one of the ballistic lab guys had to build a 6 Dasher.
Later, Frank
Just a heads up that reamer spec is .2705 neck which is on the tight side for a no turn neck, especially if you run it as a field gun in adverse conditions. Would be well suited to a "skim" pass turning the necks to clean them up without removing much material.
A loaded round with unfired/unturned Norma brass runs right at .270 +/-. You can't use that "no turn" in a .2705 reamed chamber neck. .272 is common neck size.
bullseyeshtr
Gold $$ Contributor
I recently did up a PTG reamer. Its a .272nk and .150fb with a bore rider throat. This is doing very well with lapua blue box fireforming and hydroformed with 105 hybrids, rdfs and barts gungnirs
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