Changing calibers to 6br

[skany]

Hi Guys
first post so a big hello to everyone

I have got a 1-8 4gove pacnor tube waiting to replace my 243ai 1-12 shillen & im after a little info !

Id like it to be able to double up as a point & squirt 250yd rifle with say 58g vmax(or 65g vmax) & a long range plinker/ vermin slayer!

if i load a 105g amax 50tho over the neck shoulder junktion will a 58-65g bullet get near the lands & stay in the case?

On the loading front

I have vit 140 & 150 & h414 wich may work with the heavyer stuff but not sure how good it will be with the light stuff?

my local has plenty of vit 130/133 in stock!

wht sort of velocity should i expect with a fast twist & light bullets in a 27" tube?

I shall be using lapua brass with a .272 no turn neck chamber!

cheers Andy

 

[bozo699]

Andy,
I can't help you with info you need but welcome to the site. great choice in a gun the 6brs really shoot. there are a lot of great guy's on here with oodles of knowledge just waiting to jump on your questions. good luck and have fun w/your build.
Wayne.

 

[deadlyswift]

It all depends on how long your throat is. If this is a prefit barrel and being a 1in8 twist It's probably throated for the heavier bullets. In that case if you can get to the lands with the much shorter 58gr, or 65gr pills, there is a good chance you want be able to reach them for long. Throat erosion is your enemy here. Even if you are using your own reamer I'm not so sure you'll get to the lands with the shorter bullets. Maybe but again throat erosion will be the killer. I have came to the point of just accepting the fact that it is near impossible to get a do it all barrel. So at this point I have 3 more barrel blanks on order all to be set up for different purposes.
Mark

 

[skany]

Hi

its going to be chambered to a dumy round i load up!

I have a mate whos rpa is chambered with a .100 lead & his shoots the 55s & 58 into bug holes but he has no idea how close they are to the lands!(a mate does his loading!)

Other barrels would be nice but here in the uk im only allowed the one tube/caliber for the same job!


cheers Andy

 

[Kenny474]

The 105gr A-Max's have a long bearing surface, average of .427". I would tend to think the 65gr's will be a stretch to reach the lands if the barrel is throated to the A-Max. It's not to say they won't shoot well even if they don't touch.

The best way to figure it out would be to do some testing with a Hornady bullet comparator. Seat a 105 A-Max to your intended seating depth, and then see how far out of the case the 65's need to be to reach the same OAL measured off the ogive. If the comparator has a hole the same size as the bore diameter to the lands than you should be able to make an educated guess.

http://www.hornady.com/store/Lock-N-Load-.234-.678-Comparator-Set-With-6-Bullet-Inserts/

 

[deadlyswift]

As Kenny474 said, having a long throat doesn't mean you want be able to shoot the lighter bullets. meausring off the ogive of each bullet will give you some what of a idea of what your up against. I have a 220swift that the 40gr. blitz king is just barely hanging on to the case neck to touch the lands. Luckly it shoots best .020 off the lands, but it's still just in the case enough to get the neck tension right. It did shoot well like this, but It's been awhile since I shot the 40gr. bullets and I doubt that I could touch the lands now because of throat erosion.
Mark

 

[6BRinNZ]

Another thought would be to try a 75 v-max instead of the 50s and 60s, still a pretty good compromise for splat effect. I have yet to finish loads for my 75 v-max and 105 A-max, the 75 will end up somewhere between 3220 - 3300 and the A-max is looking to be 2880 - low 2900 fps. I had to use a different powder for the 75 compared to the 105 as I ran out of case capacity before I was anywhere near a max load.

The 105 A - max is looking pretty good for groups, but the jury is still out on getting the 75 to shoot for this combination.

 

[skany]

cheers for yor input guys I have the hornadey comparator & was thinking along those lines to give me an idea anyhows!

wht do u guys think on the powder front?

wich of the ones listed would be best suited to wht weight bullet!

I used vit 150 in my 243 with bullet weights from 65-87 with great results!


cheers ANdy

 

[deadlyswift]

On the home page of the site. On the 6br info page it tells that Vit. N135 and H4895 are good powders for the light weight bullets. Varget, and RL 15 seem to be the ticket around here in the US for the heavier bullets. I have heard that Varget is hard to get a hold of in the UK. As Vit. N550 seems to be just as hard to find here in the US. I have been looking for some for 6 months with no luck!
Mark

 

[vulpesvulpes]

Hi Andy,
I have a 1 in 8 pacnor on my 6BR and it won't really shoot anything less that 75gr bullets,the rifle has a long throat through.but with 105 a-max 87gr v-max and 80gr serria's it's awesome.
I use varget with the 105's and Varget,N140 and N135 with the lighter stuff.
VV

p.s. I'm in the UK.

 

[skany]

Cheers again guys!

really looking forward to getting this tube fitted


where about in the uk are u mate?

cheers Andy

 

[vulpesvulpes]

Hi Andy,
I'm hiding out in sunny North Yorkshire(sometimes),who's doing the barrel work,I had mine build by Neil Mckillop aka-Dasherman.

Regards
Rob.

 

[spclark]

As Vit. N550 seems to be just as hard to find here in the US. I have been looking for some for 6 months with no luck!

Where are you? I have a few unopened pounds but can't ship it....

 

[deadlyswift]

As Vit. N550 seems to be just as hard to find here in the US. I have been looking for some for 6 months with no luck!

Where are you? I have a few unopened pounds but can't ship it....

Spclark, You have a pm.
Thanks
Mark

 

[skany]

Hi Andy,
I'm hiding out in sunny North Yorkshire(sometimes),who's doing the barrel work,I had mine build by Neil Mckillop aka-Dasherman.

Regards
Rob.

Hi rob

neil built my rifle about 2 years ago now in 243ai flavor & he will be seeing it again early oct to re tube it


im struggling with dies & brass like u wouldnt belive!
cheers Andy

 

[vulpesvulpes]

Hi Andy,
I wouldn't bother with the really light stuff for the BR,I use 87gr V-Max with 31gr Varget they are doing 3070fps out of a 26" barrel which is as flat as a .223 up to 300yds,
100=1"+
200=zero
300=6"-
I have found this combo ok for point and shoot at varmints out to 300yds,and then dialing in after that.
regards
Rob.