Finicky 308 win ?

[shb]

my search game must be weak today.


What twist do I need on a 308 win for 150 - 165 gr hunting bullets?


Thanks for any insight.


1:10 on some places is indicated to be for heavier bullets like 180gr

 

[nicholst55]

A 1:10 twist will certainly work, as will 1:11 and 1:12. Most factory rifles will be either 1:10 or 1:12 in .308.

 

[Zero333]

I use the a 10" twist 308win for everything from 125 gr to 200 gr.

No ill effects from over spin. Can't say the same for my 6mm fast twist barrels shooting light bullets.

 

[NC308]

Almost any twist available in 308 will be fine for those weight bullets. I feel the best all around is 1:10.

 

[Bamban]

Get a 10, and don't look back.

Good read http://bulletin.accurateshooter.com...y-whiddens-title-winning-308-win-palma-rifle/

 

[shb]

Thanks guys.

 

[284winner]

I run the 10 but if I ONLY ran 150-168 and never ran heavier, I'd have a 12.

 

[338 dude]

my search game must be weak today.


What twist do I need on a 308 win for 150 - 165 gr hunting bullets?


Thanks for any insight.


1:10 on some places is indicated to be for heavier bullets like 180gr

 

[FrankG]

1-12 twist is SAAMI spec. for 308win. Also a 12 twist will stabilize up to a conventional 190gr bullet (not solids etc...)

I've run 8, 10, 11, 11.25 and 12 twist.

A 10 twist will do what ever you want.

Later, Frank
Bartlein Barrels

 

[dannyjbiggs]

Go with the 1-11 twist rate. This twist rate was particularly developed for those that can not make up their mind between 1-10 and 1-12! Seriously though, it's that simple, and you can't go wrong.

Over 30 years ago, a wise old shooter gave me that same advise when I was stymied as to what barrel twist (10 or 12) to re-barrel my NM M1A with...he was right.

Dan

 

[MagnumManiac]

I would recommend a 12 twist IF you were only shooting a 155gr Palma bullet, but seeing you’re shooting 150-165gr bullets, then a 10 or 11 would suffice.
There’s certainly nothing wrong with a 12 twist though.
I ran a 13 twist for Palma matches personally.

Cheers.

 

[lb-ft]

Mine is 11.25

Can’t run the real heavy stuff. Wish I had a 1:10.

 

[shb]

Update: Ok, so I had this all put together for my friend.

A squared up rem 700 s.a.
A proof 10 twist cf barrel 24"
Hs stock.


I tried finding a load for it today and it was finicky. The opposite of any 308 I've ever shot.


I tried nosler 150 partitions with :
W748
Varget
Vv n140

Best was about 1 1/4"





But,.....it loved rem factory core-lokt 150's left over from the 80's. 1/2" group



And,... 125gr ballistic tips of all things...one hole.





Are there any idiosyncrasies with the proof cf barrels I don't know about?


Any clue which direction to try next?

 

[338 dude]

Update: Ok, so I had this all put together for my friend.

A squared up rem 700 s.a.
A proof 10 twist cf barrel 24"
Hs stock.


I tried finding a load for it today and it was finicky. The opposite of any 308 I've ever shot.


I tried nosler 150 partitions with :
W748
Varget
Vv n140

Best was about 1 1/4"





But,.....it loved rem factory core-lokt 150's left over from the 80's. 1/2" group



And,... 125gr ballistic tips of all things...one hole.





Are there any idiosyncrasies with the proof cf barrels I don't know about?


Any clue which direction to try next?

The three that I have had I have had just the opposite results they are not finicky at all , But mine are not 308 caliber

 

[centerlineseal]

I tried nosler 150 partitions with :
W748
Varget
Vv n140

Did you do a powder ladder test or a bullet seating test with these powders?

Amazing what such reveals!

 

[AckleymanII]

Looks like finding a reamer with the correct free bore length for those bullets is your only decision left for you to make!?

 

[shb]

This is a hunting rifle..

I very been reading up on ladder testing.
That's next.

Magazine box is 2.84






So far @ 2.80 the barrel likes:

150 speer grand slam - 1 hole... like 6br 1 hole.


150 core lokts 1/2" group

125 ballistic tips 1/2 "
110gr something 1/2"