Dasher Day

[260 Rem]

Barrel broke-In, brass fire formed ... and today started load development. 6 Dasher / Barnard action / Kreiger 1:8 twist Light Palma cut to 26" / CGI trigger / Robertson Long Range Hunter stock, chambered by Karl Schmidt.
Brass Prep
Left-6BR parent case / next-neck turned and necked up to 25 cal/ top half of neck reduced back down to 24 cal / fire formed showing shoulder blown forward.
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Initial groups
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[fish_e_o]

that's a lot of brass prep creating a false shoulder. is there a reason why you prefer to do it that way?

[260 Rem]

The Dasher chamber is about 1/10" longer than the Nk-Shoulder junction of the parent 6BR which ...unless controlled would most certainly be a serious headspace issue if the case slipped forward. So, bottom line IMO, creating a false shoulder is the safest way to deal with the potential problem. The braver Dasher fire formers, simply hard jamb the bullet to keep it back against the boltface. I am turning the top half of the neck only because my reamer is designed for a tight neck. I get good mileage from the tight chamber/neck strategy ... my last set of Dasher brass has over 25 reloads.

[Johnny G1]

Pretty nice shootin, keep up the good work and yes fire forming is a lot of work but lots of fun in the end.

[sns2]

These tiny bullets, and the accuracy you produce, must be routinely boring for you my friend. Time to move up to something bigger. I've got a box of 45-70 ammo I can donate to the cause:)

[260 Rem]

These tiny bullets, and the accuracy you produce, must be routinely boring for you my friend. Time to move up to something bigger. I've got a box of 45-70 ammo I can donate to the cause:)
Sounds good, I'll dump the powder from five of those big buggers and shoot the Dasher all week:)

A big bonus for Edmonton area shooters is that Karl is back in the gun business. No doubt he is one of the best. He has designed and built some new sporter actions with three locking lug bolts. Also making some barrels.

[fish_e_o]

The braver Dasher fire formers, simply hard jamb the bullet to keep it back against the boltface.

Lol that's what I have done because I'm a slacker:sHa_sarcasticlol:

Ever tried to get a decent cow form? I doubt it's would be possible to get a really good form because of how far you have to go maybe a close one but probably not as good.

I have to form some new brass and it's all about constant improvement so I figured I'd pick your brain.

[260 Rem]

I've never formed with cow ... nothing worse than the smell of burned cereal:). I wouldn't chance it in the Dasher because there is only one opportunity to get it right. I read that if the initial form is not good, it is near impossible to blow it out properly with successive tries. No idea if that is true as I have never had the issue using real bullets and a max load in the parent case. I have lots of "part full" boxes of bullets so fire forming is a good way to get rid of stuff that doesn't shoot so good. I talk to a chap that does all his Ackley forming with cow and he has never had any problem.
What are you fire forming?

[Johnny G1]

Fire forming, Never had any trouble with COW in my 25-303 A1 or my 25-06 Mashburn, used 15 gr. of Red Dot and held every thing together with tissue paper and fire away.

[fish_e_o]

I read that if the initial form is not good, it is near impossible to blow it out properly with successive tries. No idea if that is true as I have never had the issue using real bullets and a max load in the parent case. I have lots of "part full" boxes of bullets so fire forming is a good way to get rid of stuff that doesn't shoot so good. I talk to a chap that does all his Ackley forming with cow and he has never had any problem.
What are you fire forming?

ya i've found the cow method to be lacking and a first good form goes a long long way.

i unfortunately have a big to do list. new brass for the 220 ai has been sitting around for some time now, a lot of the the 28 nosler from 300 rum still needs to be formed, and i was looking at the dasher or maybe the 6br for a new m77 rsi i just got so your post came that the right time

[darren32]

Sorry guys .... what is COW?

Awesome 260 Rem! Very nice!

[fish_e_o]

an animal commonly found on farms, it says moo.


i kid Cream Of Wheat it's used to create back pressure to expand brass into a chamber without a conventional projectile

[darren32]

Now the "burnt cereal" thing makes sense ..... :)

Gotcha, thanks for the info fish_e_o!!

[b72471]

DASHER; brass can be formed in several ways including the hydraulic method.
Powders by choice are Re-15 & Varget. Berger bullets 105 VLD or hybrid.
In benchrest this caliber is taking over from 300-1000mtrs.

[260 Rem]

Second day out with the Ber 105 VLT (T) pushed by IMR 4166
Paper- with 32.5 and 33.0 five shot groups at 100m -1C
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Velocity on a single load at 33.0gr
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Oops, looks a little hot - Note ejector mark at 4 o'clock
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[260 Rem]

B72 - I can see the attraction the Dasher has for the long range BR shooters. It has velocity, low recoil, and with the right skill-set, pretty consistent. I am most interested in using the Dasher on a Whitetail. I have a skinny barrel Bartlein on order for next season. Next time out, I'll start to tune at 300M.
Not familiar with hydraulic forming ... care to elaborate?

[BigJon]

I'm thinking I could like that stock for a sort of business/play crossover type rifle...

[fish_e_o]

Very high quality stocks and made in Canada

[BigJon]

So I hear. Never even fondled one...

[260 Rem]

I'm thinking I could like that stock for a sort of business/play crossover type rifle...
I had Ian make the Long Range Hunter for me about ten years ago. It is a great "hybrid" design with a flat bottom on the forestock and a keel behind the handgrip --- which makes it slide smooth in the bags.
Robertson Composites was purchased by an outfit that put it into receivership, and all the eqpt was eventually sold to someone in the US (I think). As far as I know, Ian is still making stuff and chambering barrels under the name of VX Systems. I've had him modify some factory Sako stocks to fit Barnard actions. He is one of the best.

[Bobby B.]

One of the benefits of fireforming with c.o.w., it's deadly on dragonflies at close range.

Bobby

[260 Rem]

If there were dragonflies down range this morning, they were safe ... Fog made load development a waste of time at 300M as my aiming point was just a fuzzy black blob and no way to see bullet holes ... but the lord has no patience with a coward, so I shot a couple of groups anyways.
http://uploads.tapatalk-cdn.com/20160304/60d261a10994e70206aa55088de6fd98.jpg

[260 Rem]

Had to a bit of zero adjustment so just got 4 shots in one group ... and with only minor mirage to deal with today, I can see a little practice is in order to steady my nerves:).
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