6 Dasher SAAMI specs??

[Dan Hall]

Does anyone know the S.A.A.M.I. spec that is being set up for the Dasher when it comes to neck and free bore dimensions?
A diagram would be nice. Is there one I missed?
I have heard the free bore is .060 and was hoping it would be something more in line with what's needed for the 105-108 grain bullets the cartridge loves so much. Like possibly .104" for free bore? Anyone got any information on this?

 

[tmwinds]

What specs? Unless I've missed something there is no arms company chambering a rifle caliber in 6 dasher or anyone producing loaded ammo. I would assume that you could spec a reamer to whatever neck and free bore you want.

 

[Dan Hall]

I am having a Dasher reamer cut and I was talking with Dave at P.T.& G. and he was talking about the pecs that were going into the Dasher SAAMI specification. I don't know if this is real or speculation so I figured I'd put it out there and see if anyone had heard anything on this subject. This is probably just wishful thinking on my part.

 

[JRS]

The 6 Dasher is not listed on the SAAMI list of rifle cartridges.

 

[dkhunt14]

It is possible that maybe there is talk about making it Sammi. With Norma and bullets.com making brass. Also came from a very good source that Lapua is introducing it next year for there new release. Matt

 

[JRS]

Is LAPUA introducing factory loaded 6 Dasher ammo, Matt? I ran a few searches, but can't uncover anything pertaining to anyone submitting the required testing and paperwork for the 6 Dasher to be an approved SAAMI cartridge. Can you point me in a direction where I might find it?

Thanks!

 

[dkhunt14]

I just heard they were talking about releasing it as their new cartridge for running brass. I would think that maybe down the road somebody would make ammo for it. If these companies run brass as factory offerings their will be a lot more Dashers chambered. I believe fireforming is the reason some guys don't build them. Matt

 

[Dan Hall]

When I spoke to Dave at PT&G I got the impression that there has been some talk about making it a SAAMI spec cartridge. He was talking about the freebore being .060 and that not being what he would want. At the least someone is looking into this. Interesting speculation.

 

[Phil]

Also came from a very good source that Lapua is introducing it next year for there new release.

Now that would rock...... to have both Norma and Lapua producing 6Dasher brass.
If nothing else, a great rumor !.!.!
Donovan

I`ll echo Donovan`s reply.....

That would be FANTASTIC 8)

I hope it comes true.

Phil.

 

[Dave Berg]

I wouldn't expect to see a SAAMI spec for the Dasher. All the brass anticipated is from Europe and they are concerned about CIP, not SAAMI.

 

[FrankG]

Dan H., I have not heard of it being standerized by SAMMI at all but earlier this year we did make a ammunition pressure test barrel for a powder mfg. they told me how the barrel has been performing exceptionally well! I can send you a copy of the reamer print we used. I'm gonna do a couple of barrels myself in the same chamber.

Later, Frank
Bartlein Barrels

 

[Dan Hall]

FrankG that would be great. If you would send a copy of the reamer print to cascadevue@hotmail.com I would appreciate it.

 

[savagedasher]

Quick Load Has a drawing it is for a 6MM Dasher ( Whitley) data from reamer dwg. I use it for loading my Dasher. I don't of SAAMI specs. Bullets Dot Com is going to have brass. Ask them . Larry

 

[FrankG]

Dan, I will email it to you on Tuesday. I'm off Monday.

Later, Frank

 

[Titan700]

FrankG
Would you send me a copy of it to please ? raward61@gmail.com
Thanks Robert

 

[geraldgee]

Requested print in PM to geraldgee@knology.net. Thank you.

Regards.

Gerald

 

[expiper]

Frank,,,why dont you put the print on here,,,there are many who would like to see it ,,,Roger

 

[FrankG]

Frank,,,why dont you put the print on here,,,there are many who would like to see it ,,,Roger

Roger, I thought of that but was off so I couldn't do it right away. The attachments are below.

Our finish drawing that we used is marked 6 Dasher BB. Note the dimensions that I measured on the bullet seating depth. I checked it in a .236" bore barrel. Going to a .237" bore it will change your o.a.l. by approx. .010". I know it does in .30cal. barrels where I've used the same chamber reamer in a .299" bore and .300" bore barrels.

Also below is a pic. of a 105 Hybrid in relation to the case and where it touches the rifling in a .236" bore barrel.

http://i1220.photobucket.com/albums/dd457/gto66/P1050906_zpslig2ircp.jpg

In talking to Robert Whitley from what he found out and also what we've been hearing is the reason why we changed the dimension on our reamer drawing was because that .4707" diameter which is .200" from the bolt face and we made it little bigger like a standard .308win. which is .4714". We've been hearing too many guys running into making this dimension tighter and cases start sticking in the chamber/hard bolt lift etc...I've seen the same problem with .338 Lapua. Guys start making this area tighter and guys have sticky bolt lift/extraction problems etc...tighter isn't always better!

We also found the 1.555" dimension is better than the shorter one that some guys use as well. When you fire form the brass it sets back/shrinks to 1.540" to 1.542" or so. Which we feel is fine. Some guys run a shorter length like 1.510" but then you see around .030" clearance. Which shouldn't effect anything accuracy wise but you just don't need that much clearance. Again I got help on this from Robert. So a big THANKS goes to Robert!

Our reamer is set up for the new Lapua brass not the older brass. Seems there are a minute differences there as well.

Don't take our reamer drawing as it becoming SAAMI spec. I've heard no talk about this round becoming a SAAMI standard etc...but with testing being done now with ammo test barrels, Norma having brass in the works and supposedly Lapua looking at it also (rumor on Lapua so don't quote me) it looks promising that more components will be available. The ammunition pressure test barrel we made earlier this year for a ammunition maker. The feedback I've received from them was the barrel and cartridge have been performing excellent. The barrel is a 30" finish length and a 1-8 twist with the 5R rifling. They said even with the shorter/lighter weight bullets it has been performing excellent as well.

I've seen things like this happen before and the most recent one was the .300WSM. Guys went and started ordering chamber reamers etc....and then Winchester changed the spec's on the brass. All of a sudden guys had problems with what they had vs. what was actually being made. So be careful with what you do.

Later, Frank

 

[FrankG]

Says the file is too big! Won't let me attach the print. I've tried scaling it down. Any ideas?

Later, Frank

 

[Dan Hall]

Thanks for the reamer prints and all the associated info Frank. In my mind there seems to be to much interest in this cartridge for it not to be standardized pretty soon.