1-10 twist 6mm, 6x47Lapua as well as 6Br

[wildcatter]

Interested in any EXPERIANCE, with either in this barrel twist!

Please I could care less about any other cartridge than these two, so don't post them.

I'll be cutting this new barrel in this slower twist. I'm looking for you best powders w/ bullet weights, and results using them in both.

Barrel lengths, but I'm pretty sure 26" will be my preferred choice after shooting both with 1-8 twist.

Long range Varmint is what it will be mainly built for, as well as 100 to 400 yard factory modified for Varmint for score.

Thanks ahead for any hands on experience results.

 

[vlcakc]

Here are the results of some testing I did several years ago. http://forum.accurateshooter.com/threads/6x47-lapua-loads.2381201/

 

[Clancy]

6BR all the way. I’m using N135 with 80s and N140 with 88s. Both of them have shot 3 shot groups in the .0s and 5 shot groups in this high .1s and low .2s. Lapua brass, but Peterson is just as good. .104 freebore for sure.

I have a good friend that uses Varget. His rifle shoots well with 87s, but I’m not a fan of Varget, and he doesn’t get the speeds I do.

H4895 will give great speed for 80s, as will IMR 8208 XBR if you’re in a wet climate. Myself and many others tried the 8208 in the desert and it just didn’t hold accuracy as it sped up. I even ruined some brass trying to hit that next node.

 

[gunsandgunsmithing]

Another good load to try in a 1-10 is 31.0 gr of Varget and a 90 Berger just into the lands, as a good starting place. Oh, in a 6BR. Never owned a 6x47 so can't be much help with it. Either way though, don't get caught up into the idea that you must shoot "twist appropriate" bullets. Don't be afraid to test lighter weights too. I've been testing a 10 in BR comps and the absolute best accuracy has consistently been with 68-80 gr bullets.

 

[wildcatter]

That 31.1 grain load is what I shoot in my 8 twist with 95 grain BT VLD. It is a Dasher beater with this load. I went with the 1-10 barrel hoping to get better terminal bullet performance at beyond 500 yards. For 600 yard Group and score at 3050 fps. This is what speed most are getting with the Dasher using 105s, but destroying their brass to do it. The 95 grn I am shooting is the same Coef. as the Berger 105 or 108, and my brass lasts!

I also shoot a 6x47 L with a 1-8 using 108 Barnburners and H4831. but I'm getting about 3150 with it and not pushing me brass like I would have to with a dasher. But these guns have my paper punching covered beyond 500 yards.

I will be working with bullets as light as 80 grains, but no lighter. Beyond 600 yards the lighter bullets offer no advantage at all. As velocity slips to no more than the 80's in either chamber, and they get more affected by the elements. 400 yards for just paper will work with either. But bullets need to expand or anything less than head shots produce crawl offs. In my world, if I cant kick it, it aint dead, and dont count! I need terminal bullet performance for when I reach out to kill the varmints.

I should have given a little more info to begin with. Because to me if 100 fps difference is all either have to offer, I'll stick with the 6BR. If were talking 200 or so fps with medium weight bullets, and as good for accuracy,, well the 6x47 L then gains some benefit.

 

[gunsandgunsmithing]

That 31.1 grain load is what I shoot in my 8 twist with 95 grain BT VLD. It is a Dasher beater with this load. I went with the 1-10 barrel hoping to get better terminal bullet performance at beyond 500 yards. For 600 yard Group and score at 3050 fps. This is what speed most are getting with the Dasher using 105s, but destroying their brass to do it. The 95 grn I am shooting is the same Coef. as the Berger 105 or 108, and my brass lasts!

I also shoot a 6x47 L with a 1-8 using 108 Barnburners and H4831. but I'm getting about 3150 with it and not pushing me brass like I would have to with a dasher. But these guns have my paper punching covered beyond 500 yards.

I will be working with bullets as light as 80 grains, but no lighter. Beyond 600 yards the lighter bullets offer no advantage at all. As velocity slips to no more than the 80's in either chamber, and they get more affected by the elements. 400 yards for just paper will work with either. But bullets need to expand or anything less than head shots produce crawl offs. In my world, if I cant kick it, it aint dead, and dont count! I need terminal bullet performance for when I reach out to kill the varmints.

I should have given a little more info to begin with. Because to me if 100 fps difference is all either have to offer, I'll stick with the 6BR. If were talking 200 or so fps with medium weight bullets, and as good for accuracy,, well the 6x47 L then gains some benefit.

Love it when actual test results trump internet speak. Thank you! Been preaching the mid weights in a br variant for a while, after my own testing. But it seems bc is what most crave, regardless of actual performance, with limited or no testing of both.

 

[Clancy]

@wildcatter if you’re shooting prarie dogs I’d probably avoid the 88s and shoot Bart’s 80 grain Dominator. The 88 is more of a deer bullet or a hybrid in behavior. You’ll have some crawl off on you.

6x47 shoots well too, but it flat will not outshoot a 6BR.

 

[wildcatter]

@wildcatter if you’re shooting prarie dogs I’d probably avoid the 88s and shoot Bart’s 80 grain Dominator. The 88 is more of a deer bullet or a hybrid in behavior. You’ll have some crawl off on you.

6x47 shoots well too, but it flat will not outshoot a 6BR.

Yes I her you, there are a lot that think what they read is gospel. I had many doubters, even after using a Savage Axis that weighted 14.5#, to take down 18 shooters for high score at 600 yards' They all were shooting full blown 17# custom actioned light guns. I think I could sneak in a few more wins if it were not for the 1.2# trigger! But mainly those guys shoot Dasher, 6BRA, BRX, and a couple 6BR as me. But they all fall for that 105 to 115, and stomp the guts out of them.

No dogs, ground hogs are about the smallest varmint. Yotes and feral %&#s. Mainly the Ground Hogs. no barrel melting continuous shooting. My 6x47L has been a pretty easy caliber to tune. I just don't know if it has that much more to offer in speed over the BR with those 80 to 95 grain bullets to make it worthy?

I do believe the dasher is finally loosing some the fad followers it had. In my book it is one BR variant I steer around!

 

[Clancy]

Yes I her you, there are a lot that think what they read is gospel. I had many doubters, even after using a Savage Axis that weighted 14.5#, to take down 18 shooters for high score at 600 yards' They all were shooting full blown 17# custom actioned light guns. I think I could sneak in a few more wins if it were not for the 1.2# trigger! But mainly those guys shoot 6BRA, BRX, and a couple 6BR as me. But they all fall for that 105 to 115, and stomp the guts out of them.

No dogs, ground hogs are about the smallest varmint. Yotes and feral %&#s. Mainly the Ground Hogs. no barrel melting continuous shooting. My 6x47L has been a pretty easy caliber to tune. I just don't know if it has that much more to offer in speed over the BR with those 80 to 95 grain bullets to make it worthy?

200 fps range. I shoot about every mid sized 6mm there is and the BR and GT are my favorites, followed closely by the 47. Is still sat the 80 Dominator, but don’t turn your nose up at the 80 Berger, hillbilly or Sierra.

87 vld over the 88, for small to medium varmints. Much, much more explosive. Like on the nasty side.

Every one of my hunting guns are 20.5” kriegers. In the BR, I run the 87/88 at 3030 and the 80s 3200, with room.

 

[nakneker]

Tagging in. Just had a 6x47 built, it’s a fast twist set up for the heavies but I’m interested in the slower twist light bullets too. I’m a huge fan of the case. I’ve always liked 6BRs in its many forms but was in the mood for something different. My 6.5x47 and 25x47 have always been easy to tune… curious to see what other think. Thanks for starting the thread…

 

[WyleWD]

If you're going to shoot matches go with the 6br. If you're primarily going to use it for 'chucks and the like then maybe give the 6x47 a little more consideration. (Good luck on that one)

The 10tw 6br is overlooked and under rated in usefulness in matches out to 400yds IME. 80-90gr bullets with H4895, 8208, and N135 is what we used for the 9, 10, and 12twBR. JME. WD

 

[wildcatter]

If you're going to shoot matches go with the 6br. If you're primarily going to use it for 'chucks and the like then maybe give the 6x47 a little more consideration. (Good luck on that one)

The 10tw 6br is overlooked and under rated in usefulness in matches out to 400yds IME. 80-90gr bullets with H4895, 8208, and N135 is what we used for the 9, 10, and 12twBR. JME. WD

I agree and have a shorter barreled 22.5" 10 twist 6BR, deadly out to 500 yards on GH with 62 and 68 grain bullets around 3500 fps. Accuracy is steller, but those little pills slow down to fast for any reliable expansion beyond 450 to 500 yards. The heavies hold their speed better and loose less at 50, but since they start much slower, they just don't enough left to expand on the thin skinned Varmints.

Just not sure the 6x47L can muster enough to give it another 100 or more yards for reliable expansion either. This just might be a build it, @ 26.5", then if I can't have my cake and eat it too, settle for 25.5" 6BR and eat a chambering cost?