Building my first 6mmBR

[bobtails]

I am building a 6mmBR with a Pac-nor 10 twist barrel. Do you think I will be able to shoot the 95 grain Berger vlds out of it? It is a #4 contour. I want something that weighs around 10 lbs. sometimes I do a lot of hiking for chucks. This may get used on a occasional antelope. What are you suggestions? Thanks

 

[jelrod1]

Maybe, maybe not. I'm getting ready to try them in my 10 twist Krieger but I'm not sure if it'll work or not. The 90 Berger BT do really well but like you I'd like to try something else to stretch it out a little more without getting another barrel.

 

[CatShooter]

I am building a 6mmBR with a Pac-nor 10 twist barrel. Do you think I will be able to shoot the 95 grain Berger vlds out of it? It is a #4 contour. I want something that weighs around 10 lbs. sometimes I do a lot of hiking for chucks. This may get used on a occasional antelope. What are you suggestions? Thanks

Berger says it needs a 9" twist.

 

[bobtails]

Thanks Catshooter I am afraid of this and am still wondering if anyone has tried this and had success or not. I may be limited to a 87 grain bullet.

 

[hogpatrol]

I had a 10. It liked 80s & lighter the best.

 

[CatShooter]

The 6mmBR is not very fast with heavy bullets. You might have problems even with 87's too.

Richard Franklin, a very well known riflesmith who built beautiful long range varmint rifles, specialized in the 6mm (244) AI, and his favorite bullet in the beginning was the 87 V-Max, but he shifted to the 75gr V-Max as his final favorite. And his rifles were built for 800+yard woodchucks.

I shoot 65 V-Maxs in my 6mmBR and love them. I started with 87's in my 244 Rem long range rifle, and also switched to 75 V-Maxs.

Sometimes, what looks good in a computer, is not what works well in the field, especially with woodchuck and crow rifles (my two favorite targets).

 

[Steve3]

I am considering my first 6BR build as well. Want to keep it simple. So do I read this all correctly - 1-8 or 1-9 twist. Not too heavy a bullet 75g maybe less.

 

[Toby Bradshaw]

If the 95 VLDs won't stabilize, try the BIB 95FB. Work like a charm in my 1-10 6BR.

 

[jelrod1]

Just shot these today at 300 yards. 90 grain berger BT in a 10 twist Krieger. Bipod and squeeze bag. I'm liking these bullets so far.

Top row left to right:
XBR 30.6-1 / 5 shot .660
XBR 30.6-2 / 3 shot .415
XBR 30.6-3 / 3 shot .842

Bottom row left to right:
XBR 30.8-1 / 5 shot .812
XBR 30.8-2 / 3 shot .642
XBR 30.8-3 / 3 shot .650

Shot a couple 5 shot groups of my Varget load first. V-1 includes the cold bore/clean bore shot (lowest hole)

Varget 30.6-1 / 5 shot .809
Varget 30.6-2 / 5 shot .943

 

[bobtails]

Nice result there. What were your speeds?

 

[Tim Singleton]

My 10twist CBI will shoot the 87gr vmax.
It will not shoot the 95 gr Berger

 

[GSPV]

I shoot a 10 twist for local varmint matches, live varmints and such.

The Berger 87 VLD and 90 BT shoot great for me with XBR and Varget. The 95 BIB FB showed promise, but I don't have quite enough freebore for it. Bought two BRDX reamers from two fine gentlemen here to cure exactly that problem and to open the 104-108 world up to me with an 8 twist another gentleman here sold me.

The 87 VLD hunting is great if you find the seating depth. It will turn a coyote inside out.

The 90 BT seems more forgiving of seating depth to me. I made a dummy round trying for just kissing the lands, put on a 6 and a 5 shim, dumped some Varget, 2 thou neck tension and shot little groups. Nice, gently descending POI as I incrementally increased charge. So, pick the middle one and go.

 

[jelrod1]

Nice result there. What were your speeds?

The Varget load is slow at 2780 with ES of 15-20 and the 30.6 XBR load is 2960 with single digit ES. The XBR 30.8 was 2980 with single digit ES also. 24" barrel plus brake with CCI 450 primers. Need to test some higher charge weights with Varget but just haven't yet.

 

[Webster]

Why not a no turn neck 6BRX since you want heavier bullets with some velocity. Just fire form the cartridge . You don't have to form a false shoulder like you do on the Dasher. I wouldn't think the 95 VLD hunting bullet would expand on a GH? Someone else could comment on this. I have only shot 58-70 GR bullets in my 6BR.

 

[CatShooter]

I wouldn't think the 95 VLD hunting bullet would expand on a GH? Someone else could comment on this. I have only shot 58-70 GR bullets in my 6BR.

The 243 95 hunting bullet will zip through a woodchuck like an icepick.

 

[bobtails]

Well I went and ordered a 7.5 twist Bartlien with 5R rifling. So now I'll wait for that. I'll try to sell the 10 twist.

 

[dkhunt14]

The 6mmBR is not very fast with heavy bullets. You might have problems even with 87's too.

Richard Franklin, a very well known riflesmith who built beautiful long range varmint rifles, specialized in the 6mm (244) AI, and his favorite bullet in the beginning was the 87 V-Max, but he shifted to the 75gr V-Max as his final favorite. And his rifles were built for 800+yard woodchucks.

I shoot 65 V-Maxs in my 6mmBR and love them. I started with 87's in my 244 Rem long range rifle, and also switched to 75 V-Maxs.

Sometimes, what looks good in a computer, is not what works well in the field, especially with woodchuck and crow rifles (my two favorite targets).

If the heavier bullets shot in a 8 twist are not good why do all the 1000 yard F class and Benchrest shoot the heavier 103 to 108 grain bullets? Simple answer more accurate and less wind drift.

 

[CatShooter]

The 6mmBR is not very fast with heavy bullets. You might have problems even with 87's too.

Richard Franklin, a very well known riflesmith who built beautiful long range varmint rifles, specialized in the 6mm (244) AI, and his favorite bullet in the beginning was the 87 V-Max, but he shifted to the 75gr V-Max as his final favorite. And his rifles were built for 800+yard woodchucks.

I shoot 65 V-Maxs in my 6mmBR and love them. I started with 87's in my 244 Rem long range rifle, and also switched to 75 V-Maxs.

Sometimes, what looks good in a computer, is not what works well in the field, especially with woodchuck and crow rifles (my two favorite targets).

If the heavier bullets shot in a 8 twist are not good why do all the 1000 yard F class and Benchrest shoot the heavier 103 to 108 grain bullets? Simple answer more accurate and less wind drift.

Not a simple answer. I was NOT addressing 1,000 yard benchrest and 1,000 yard shooting at paper. The heavy bullets are not necessary more accurate, and at long range, zip through woodchucks like an icepick.

It is obvious that you didn't read my post, or if you did, you didn't understand it...

... and that you don't shoot long range woodchucks and crows.

 

[johara1]

Cat shooter, a 105 berger hunting VLD @ 3000 out of a Dasher at the muzzle will be 1598 at 1000 yds and 595 lb. of energy and a drop of 258" and a 6mm with a 87 gr.V max. Hornady @3300 at the muzzle will have 1211 FPS. and 283 lb. of energy and a drop284". A Berger 105 is a J4 jacket and goes off like a pipe bomb when it hits, the 87 is a joke if you can hit any thing with any kind of wind at 1K....jim

 

[Forum Boss]

This doesn't help the Original Poster, but If I built another 6mmBR or BRDX or Dasher, an 8-twist would be my first choice, even in a varmint rifle. Reason -- you can shoot anything. The Berger 80gr flat-base bullets have shot in the high ones/low twos in my 8-twist PacNor. Plenty fast, super-accurate, and I can switch to 90s, 95s, 103s, 105s, 108s as the need arises.