6BR twist rate

[Skunce]

I want to buy a 6BR barrel for my Savage LRPV. I'm thinking of going with a 1-8 twist. My question is have any of you had any problems with 55-58 bullets coming apart with this fast of a twist? I'm going to use it for live varmints and informal target shooting and would like to be able to shoot 105's & 107's, but most of the time I will be shooting bullets in the 55-87gr range.
Anyone have any suggestions on the number of grooves? The local bench rest guys seem to like the three groove barrels. Is there any problem with using a three groove for a varmint gun?

 

[EAtts]

I use a 1 in 12 PacNor on my 6BR with 55 grain Blitzkings. I have also shot 58 and 65 grain V Maxs well. For these bullets I would get another 1 in 12 twist.

 

[chino1969]

I have a 6mm BR barrel with a 1 in 7.5" twist that I will be experimenting with to see if I can shoot lighter bullets. It, or course, shoots the 105grn. + bullets extremely well. The lowest I've shot, thus far, is 95grn. Bergers but I want to try varmint bullets in the 68grn. to 87grn. range. If they don't fly apart, they should be explosive on varmints.

I have another 6mm BR barrel with a 1 in 14" twist that shoots 65grn. to 70grn. bullets very well. I'm going to try some 55grn. bullets to see how it performs.

I have several three groove Pac Nor barrels and they are great. The only difference I've noticed is they clean easier; no difference in accuracy that I can detect.

Lou Baccino
Chino69

 

[6BR]

The 1-8 twist barrel will shoot 75grn on up to 105grn bullets very well. I went with a 1-8 twist on my 6BR, so I can shoot the 87grn V-Max aswell as the 105grn A-Max bullets. You can't go wrong with the 1-8 twist barrel. However, if you go with a slower twist barrel, you will limit yourself with bullet selection.

 

[Skunce]

Sounds like I need two barrels. Thanks for the input.

 

[MarkS]

Skunce,

One problem with the 55, 58 is that you can have trouble touching the lands in most guns. Also if you are throating for the 105 & 107, it may be farther out. I would just move up to 70 gr to 87 gr. I think you will find they work better anyway.

Mark Schronce

 

[Skunce]

I had PTG grind my reamer for the lighter bullets in the range of 58-87 grains. Since I hadn't ever chambered a barrel before I bought a Adams and Bennett F44 barrel from Midway and fit it to an old 788 action. The quality of that barrel really surprised me it will shoot 1/2" three shot groups all day long and cleans up very easily. For my next barrel I'm going to buy a Bartlein to install on the LVPR. If I decide to shoot the heavier bullets I'll buy a different reamer maybe a Dasher and an eight twist barrel. I'm looking forward to trying out the 6BR on rockchucks next year.