6mm dasher vs. 6x47 vs. 243ai

[TEAMSENDIT]

so here is the deal I am currently having benchmark build me another rifle. It consists of a mcmillan A5 fully adj. in gap camo, fn spr reciever, cdi dbm system and I have a medium palma 6mm 8 twist 8 flute barrel and it will be a finish length of 26". getting everything lined up was the easy part choosing a caliber is the hard part for me.

For this rifle I will be doing long range varmint shooting, f class 500-1000yd, and tactical shoots. i am not LE or military so I don't need an work rifle. What I do need is a rifle that no matter what the rifle is ready to perform.

i have experience with the 243ai and love it but am concerned it will get to hot in long shooting strings. I know the 6mm dasher will need some mag modification but that doesn't bother me. The brass is a wash for me because no matter what I am using lapua.

All experiences good or bad are welcome.

thanks scott

 

[Blackhawk95]

Re: 6mm dasher vs. 6x47 vs. 243ai

From everything Ive read, the 6x47lap is a pretty awsome round. right in between dasher and .243AI.

I have a 6mmbr and a .243Ai on a switch barrel gun. Ive actually been thinking of rechambering the 6mmbr to the 6x47lap. For some resaon I just havent been able to get the 6mmbr to shoot as well as I thought it should.

Myself, I would go with the 6x47lap

Merry Christmas!!!

 

[buffybuster]

Re: 6mm dasher vs. 6x47 vs. 243ai

Of the three, I'd pick the 6x47 Lapua. That one has the least amount of caseforming (not burning barrel life to get usable cases) and it's between the other two.

 

[shooter65]

Re: 6mm dasher vs. 6x47 vs. 243ai

dasher - most accurate and efficient. probably won't feed in a repeater.

243 ai - barrel burner.

6x47 - is the winner. great caliber and brass available.plus it will feed flawlessly.

 

[wnroscoe]

Re: 6mm dasher vs. 6x47 vs. 243ai

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Blackhawk95</div><div class="ubbcode-body"> For some resaon I just havent been able to get the 6mmbr to shoot as well as I thought it should. </div></div>

Lapua Brass, .002" neck tension, 30.3 grains of Varget, CCI450 Primer, 105 Berger VLD just touching the lands. If your rifle doesnt shoot this load or show some promise, chunk it and start over.

 

[steve123]

Re: 6mm dasher vs. 6x47 vs. 243ai

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: diggler44</div><div class="ubbcode-body">so here is the deal I am currently having benchmark build me another rifle. It consists of a mcmillan A5 fully adj. in gap camo, fn spr reciever, cdi dbm system and I have a medium palma 6mm 8 twist 8 flute barrel and it will be a finish length of 26". getting everything lined up was the easy part choosing a caliber is the hard part for me.

For this rifle I will be doing long range varmint shooting, f class 500-1000yd, and tactical shoots. i am not LE or military so I don't need an work rifle. What I do need is a rifle that no matter what the rifle is ready to perform.

i have experience with the 243ai and love it but am concerned it will get to hot in long shooting strings. I know the 6mm dasher will need some mag modification but that doesn't bother me. The brass is a wash for me because no matter what I am using lapua.

All experiences good or bad are welcome.

thanks scott </div></div>

Scott,

Merry Christmas,

The Dasher is tempting.If all out accuracy is the concern then that might be the way to go even though it would be some work in the feeding and forming department.

6x47L is just hard to beat for allot of reasons!!!

If you go to Benchrestcentral and look up alinwa's posts about his extensive experimentation with 6x47L you'll find lots of advanced loading tips and techniques about this cartridge including,dies,chambers,etc.
In the end he was able to get consistent 2" groups at 600 yards in calm conditions and felt that the cartridge would be able to win 600 benchrest competition.

6x47L on left with 115's seated out of the neck/shoulder junction

Steve

 

[chrisj]

Re: 6mm dasher vs. 6x47 vs. 243ai

6x47 with RL17 gets you 3300 fps with 105-107 bullets..Dasher Won't do that, and 243 AI will do about the same with 15-20% more powder and worse bbl life.

 

[shooter65]

Re: 6mm dasher vs. 6x47 vs. 243ai

30.5 gr for me with everything else you listed. Mine shoots lights out. had one hell of a 15 shot group at 600 yards yesterday.




<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: wnroscoe</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Blackhawk95</div><div class="ubbcode-body"> For some resaon I just havent been able to get the 6mmbr to shoot as well as I thought it should. </div></div>

Lapua Brass, .002" neck tension, 30.3 grains of Varget, CCI450 Primer, 105 Berger VLD just touching the lands. If your rifle doesnt shoot this load or show some promise, chunk it and start over. </div></div>

 

[9H_Cracka]

Re: 6mm dasher vs. 6x47 vs. 243ai

The 6x47 is very similar in capacity to my 6mm/22-250. The case capacity is a good match, meaning efficient use of the powder, for the 6mm bore. The Dasher is a bit short on capacity and the 243AI uses an additional 8-10 grs over the 6x47 for very little increase in velocity.

I run my 6/250 pretty mild (2875 FPS with a 107 SMK using 37.0 grs RL19) but contact Sendero Man if you want some screamin' 6x47 loads using different more modern powders. He's running over 3k with his.

NOTE - if the 6x47 were available when I built my 6/250 it most likely would have been a 6x47 instead, though the 6/250 is a no muss/no fuss chambering using commonly available brass (commercial 22-250) and Redding catalogs the dies. A single pass with the tapered expander and the case is ready to load.

Hard to go wrong with the 6x47, but be sure and read some of the primer piercing/cratering threads around using the FN action. Plan on sending your bolt to Greg Tannell (Gre Tan) to have the FP bushed before you fire the first round.

 

[sawhornsoff]

Re: 6mm dasher vs. 6x47 vs. 243ai

Take a look at the 6XC.

 

[Bronco]

Re: 6mm dasher vs. 6x47 vs. 243ai

Have had good results with the 6 Dasher, rebarreled a Rem. PSS with a 24" 7.8 twist barrel. Pushing 105 - 108 at 3050 fps. First group was a .310, under good conditions 1/2 moa to 850 yd. The rifle already had Badger bottom metal and Dasher rounds feed fine from either 5 or 10 round mags.
I like it well enough I'm building a second one on an AI chassis.

 

[wnroscoe]

Re: 6mm dasher vs. 6x47 vs. 243ai

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: shooter65</div><div class="ubbcode-body">30.5 gr for me with everything else you listed. Mine shoots lights out. had one hell of a 15 shot group at 600 yards yesterday.</div></div>

Yea, I think every 6BR out there would shoot something from 30.0 to 30.6 with the above combo. Go to 300 yards and run a test on seating depth, move .005" at a time and fire groups with each. I've cut groups in half by doing this. My 6 BR would shot 10 shots that could be completly coverd with a dime at 330 yards. Never measured them.

 

[shooter65]

Re: 6mm dasher vs. 6x47 vs. 243ai

I ended up with a OAL of 2.737.



<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: wnroscoe</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: shooter65</div><div class="ubbcode-body">30.5 gr for me with everything else you listed. Mine shoots lights out. had one hell of a 15 shot group at 600 yards yesterday.</div></div>

Yea, I think every 6BR out there would shoot something from 30.0 to 30.6 with the above combo. Go to 300 yards and run a test on seating depth, move .005" at a time and fire groups with each. I've cut groups in half by doing this. My 6 BR would shot 10 shots that could be completly coverd with a dime at 330 yards. Never measured them. </div></div>

 

[TEAMSENDIT]

Re: 6mm dasher vs. 6x47 vs. 243ai

what modifications to the mag did you do to run the dasher. I am currently building one specifically for f class in aics 2.0 and surgeon 591 w/broughton 30" 8 twist carbon wrapped barrel in 6 dasher.

thanks for all the replies guys keep it coming.

 

[Bronco]

Re: 6mm dasher vs. 6x47 vs. 243ai

what modifications to the mag did you do to run the dasher.

I didn't have to do anything, ran fine first time I tried them and ever since.

 

[TEAMSENDIT]

Re: 6mm dasher vs. 6x47 vs. 243ai

would anybodies opinion change if i added the standard 243 instead of the ackley?

 

[shooter65]

Re: 6mm dasher vs. 6x47 vs. 243ai

243 with a 7.5 or 8 twist is excellent for a tactical match rifle. Again, barrel life is not that long. Lapua brass is also available.



<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: diggler44</div><div class="ubbcode-body">would anybodies opinion change if i added the standard 243 instead of the ackley? </div></div>

 

[skeetlee]

Re: 6mm dasher vs. 6x47 vs. 243ai

go with a good old standard 6br with an 8 or 10 twist. The accuracy potential is unbeatable out to 600 yards. If you look at any benchrest match results there will be 8 or 9 out of the top 10 shooting a dasher or some type of BR variant. sam hall won the 600 yard nationals with a standard 6br. thats all i know!! Lee

 

[Krebaum]

Re: 6mm dasher vs. 6x47 vs. 243ai

+1 on the Dasher.
105 Bergers at 3050 with 1/2 moa or better, 24" barrel, what's not to like.
I have a Remington 700 chambered in 6 Dasher with the Badger M5 magazine kit and it works flawless. I do have a custom Kiff bolt which has the .062 firing pin and Sako extractor. I did slightly modify the ejector plunger, so it would sit slightly more forward to have better extractor pressure on the cartridge. I did not make any modifications to the mags, I load them with the cartridges to the ft of the mag.

 

[Criver600]

Re: 6mm dasher vs. 6x47 vs. 243ai

If your running 105/107's nothing can hang with a Dasher out to 600 yards. If you want to shoot the 115's you probably need a little more ass...........

 

[TEAMSENDIT]

Re: 6mm dasher vs. 6x47 vs. 243ai

this is great news about the magazine feeding. I was leaning towards the dasher already. it just seems crazy that with 33grains of powder you can push a 107 the same speed as a 243 with way less powder and way more room to seat your bullets.

thanks for the input guys getting very excited.