Thinking of converting my .308 to a 6 Dasher

[retired]

"The 7MM’s rule the 1K line now . "
per who?
i have seen one in my travels and he is an f class that shoot br for fun. yes i gave seen a couple in results, but few and far between.
i looked in early year results and found 3 7's

I think what your trying to tell us is your 308 doesn’t perform well at 1K. Your 6BR does if the wind isn’t to bad. Your shoulder hurts from previous injuries so recoil is a factor. Your looking for a a very accurate caliber/cartridge with light recoil using a 308 bolt face. Aren’t we all?
The 7MM’s rule the 1K line now but they kick. The 6MM’s (Dasher, BRX, 6XC, 6CM etc) are better in the wind due to velocity. So what’s left? I suggest one of the 6.5’s. The 6.5CM or the 260 Rem. High BC bullets, less recoil than the 308 lots of proven loads, easy to tune.

 

[steve123]

My figures below, derived from SHOOTER app, are for a 5mph wind from 3 o'clock at 1000Y.

At 1000Y there's not much difference in how a 6 Dasher and the two 6.5s you mentioned do in the wind. Basically you are trading roughly the BC of the 6.5's for the velocity of the Dasher.

Also you're only gaining a little over 100 fps comparing 6mmBR to Dasher. Granted even a little helps but it's only a few inches at 1000Y. The difference is not dramatic.

A for instance - my friend has a 6x47L too and uses 105 hybrids like I do. His goes 3020 fps and mine 3172 fps. According to my ballistic app I've only got him by 1.1" in the wind and that's roughly the difference between a Dasher and 6BR with the same bullet.

This is my personal comparison... Like I mentioned my 6x47L with 105 hybrids/.536G1 is going 3172 fps, that sounds like it doesn't blow in the wind much, does it??? No it doesn't but not compared to some cartridges.

Next step up is my 6.5 Saum, 140 hybrids/.618G1 at the same speed. It's a little easier to hit steel in the wind with it but the extra powder/60 grains, it only gives me 4 inches less wind drift than my 6. My twist rate is 8.5 so for now my barrel won't work for the real heavy 6.5 bullets otherwise I'd use them.

Next step up is my 30-375R, 225's/.777G1 at 2935 fps. Now I'm at 7.5 inches less wind drift than the 6x47L which is becoming substantial.

The ballistic app calculates a estimate of wind drift but it's not perfect, it might be slightly off, seems so in field conditions sometimes. I've shot the 6x47L and the 30-375R side by side on steel in the same wind conditions and that 30 cal will smoke the 6 in the wind, it "is" like cheating. On a 10-15 mph day with half value winds I missed quite a bit with the 6 but connected way more often with the big 30 than I would have thought at the start of the session. I was surprised.

7mm caliber might be the best compromise in your case, pun intended. Something like a 7 Saum with those high BC 180's to ??? at 3000 fps. Heavy rifles with long heavy barrels and a good muzzle brake go a long way in taming felt recoil.

Notice that I didn't give an accuracy comparison. These 3 rifles I mentioned are sub 1/2" at 100Y and they are tactical rifles shot off of bipods. You might require more accuracy than that and where a Dasher or 284Win will excel if you get a hummer of a barrel.

 

[jr600yd]

I have no reason to doubt Steve’s replay. I onLy suggested the 6.5’s because of recoil. Since the OP has a bad/sore shoulder 60+ grains of powder is gonna hurt!

 

[steve123]

I have no reason to doubt Steve’s replay. I onLy suggested the 6.5’s because of recoil. Since the OP has a bad/sore shoulder 60+ grains of powder is gonna hurt!

It would seem so, and without a muzzle brake, yes the recoil might be getting uncomfortable. But my 6.5 Saum has the same felt recoil as my 6x47L. 23lbs for the 6.5 Saum and 16lb for the 6x47l, and both are braked.

That 30-375R is another barrel for the same Surgeon XL action in 6.5 Saum. The felt recoil even with those 225's is much less than my 40x in 308, or my 8mm Mauser, etc.

 

[jr600yd]

Steve, that makes sense as long as muzzle breaks are allowed or used for informal target practice.

 

[MrBottleneck]

I have no reason to doubt Steve’s replay. I onLy suggested the 6.5’s because of recoil. Since the OP has a bad/sore shoulder 60+ grains of powder is gonna hurt!

Im the OP but its not me with a bad shoulder that was Twicepop who added in hes thinking about doing the same thing as me.
Recoil not an issue for me really but, getting a high BC bullet takes going to like a 200.20x Berger and then my fps drops off in trade.

Ok, so whats the future of 6XC do you fellas using it see there coming a time soon where the one place you can get brass drys up?
The BRX seems like a good choice to me and really has my interest after a night of reading about it. Getting a 115gr with a better bc and going faster. Then again theres the 6.5x47
Like some stated about one of those in this post whats not to like.

I appreciate everyone chiming in.

 

[4xforfun]

if you finish reading...you will see where i agreed..my mistake..i posted it.

Yep....sorry...i missed it.

My bad,

Tod

 

[dskogman]

"The 7MM’s rule the 1K line now . "
per who?

From this years Berger Southwest nationals. That’s pretty much owning the 1k line at least in F Open.

 

[r bose]

OP, to answer your question I can't imagine seeing XC brass going away. Norma has been making it for several years now and it's high quality. Tubb invented the XC almost 20 years ago (I think) for XTC shooting. If for some reason the brass would dry up, I've used 22-250 brass simply by running it thru the XC sizing die, loading and shooting. With reasonable loads I'm getting 10+ firings on my Norma brass.

 

[Twicepop]

Im the OP but its not me with a bad shoulder that was Twicepop who added in hes thinking about doing the same thing as me.
Recoil not an issue for me really but, getting a high BC bullet takes going to like a 200.20x Berger and then my fps drops off in trade.

Ok, so whats the future of 6XC do you fellas using it see there coming a time soon where the one place you can get brass drys up?
The BRX seems like a good choice to me and really has my interest after a night of reading about it. Getting a 115gr with a better bc and going faster. Then again theres the 6.5x47
Like some stated about one of those in this post whats not to like.

I appreciate everyone chiming in.

I looked at the XC, and it looks like it may have a slight velocity advantage over the Dasher. But through my internet searches it looks like the items needed to reload the two (XC and Dasher) seem to be more readily available for the Dasher, at least at this time. The 6X47 isn't out of the realm of possibilities either, it also has easily attainable items for loading ammo.

 

[spife7980]

Ok, so whats the future of 6XC do you fellas using it see there coming a time soon where the one place you can get brass drys up?

OP, to answer your question I can't imagine seeing XC brass going away. Norma has been making it for several years now and it's high quality. Tubb invented the XC almost 20 years ago (I think) for XTC shooting. If for some reason the brass would dry up, I've used 22-250 brass simply by running it thru the XC sizing die, loading and shooting. With reasonable loads I'm getting 10+ firings on my Norma brass.

Plus Peterson is making it now also. http://forum.accurateshooter.com/threads/peterson-6xc-brass-for-sale.3954727/

I chose 6xc over some other alternatives last year as it seems to have staying power, its not the most popular but the fad hasnt died out over time and I dont think it will.

 

[Gr8shot]

the 6 X 47 may help you accomplish your goal. less drift than a 6.5 and less recoil. easy to neck down 6.5 brass.

 

[retired]

here i thought we were talking about real accuracy not LARGE targets.
if you read my post, (bill )shoots a straight 284 in f class.

and
I WILL POINT OUT AGAIN how vague it all is when
NO DISCIPLINE is listed on the op post.

View attachment 1053930
From this years Berger Southwest nationals. That’s pretty much owning the 1k line at least in F Open.

 

[swd]

Im the OP but its not me with a bad shoulder that was Twicepop who added in hes thinking about doing the same thing as me.
Recoil not an issue for me really but, getting a high BC bullet takes going to like a 200.20x Berger and then my fps drops off in trade.

Ok, so whats the future of 6XC do you fellas using it see there coming a time soon where the one place you can get brass drys up?
The BRX seems like a good choice to me and really has my interest after a night of reading about it. Getting a 115gr with a better bc and going faster. Then again theres the 6.5x47
Like some stated about one of those in this post whats not to like.

I appreciate everyone chiming in.

The BRX is great cartridge. If you want to run 115's then you need LOTS of free bore in the BRX. The 110 SMK has the same BC as the 115 but a lot shorter bearing length. .140"-.150" FB works well for the 105-110 range bullets. To optimize a chamber for the 115RBT DTAC's your looking around .200". A 7.5" twist as a great all around that will stabilize all of them.