6 dasher reamer?

[FrankG]

Never had a reamer built, if want to use that print, Frank, would I send JGS that spec sheet and ask them to build it? I’d be looking at around $175?

If you want to use it....it’s cool with me. It’s around the $175. I’d probably change it to a .273” neck. I’ve run Lapua and the early Norma brass with no issues.

 

[FrankG]

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

I’m not a fan of the bore rider throat. I feel once the throat starts to wear it will be hard to keep in tune and or the gun will change tune quickly over x amount of rounds being fired.

 

[Northridge]

I’m not a fan of the bore rider throat. I feel once the throat starts to wear it will be hard to keep in tune and or the gun will change tune quickly over x amount of rounds being fired.

Frank, I know where your coming from but mine and others testing and using bore rider throat and many variations have had solid results many different cases or cartridges . in the dasher case often throat will wash at about double the rate but does not appear on paper to flounder as a result do to extra creep or throat distortion. there are many things at play here that I will not discuss here but some of the best results we are having in bench rest long range, short and F-class are coming out of the bore rider type throats interestingly enough.

Shawn Williams

 

[Mikemontminy]

Here is a cut away of a 105 hybrid loaded 5 ths. jamb into a Lapua Dasher case using the ptg reamer in question with .104 freebore. It does put the bearing surface at the shoulder/neck junction. I run a mandrel thru all the necks and check them with a pin gauge afterwards to keep the donuts in check. You will have an advantage of using the full neck to support the bullet.

 

[BJ44BJ]

I've got the same body dimensions on my 6 dasher with 271 neck and .150 freebore. I like the .4708 number on the base and a harrells d3.5 or d4 die keeps the brass running smooth and the primer pockets nice and tight