300wsm 1:12 twist Biggest Bc COPPER bullets I can run?

[BoltActionBrotherhood]

I have a 20 inch 300wsm barreled action, that is in 1:12 twist I am using it for a long-range lightweight hunting rig. With 1000 yard potential. What is the biggest bullet that will work with this slow of a twist? I am in California, so I need to run full copper.
I reload, so I am looking for the best and heaviest bullet I can find that will stabilize in this twist.
Barnes seems were I am gravitating, but they suck at listing their twist rates. but would love to find something in the 175+ Range.
Thanks guys .

 

[scope-eye]

I know that I could shoot Barnes 168s out of my 12t 300 WSM.
70gr + - RL17 = 3400 + fps

Dean

 

[BoltActionBrotherhood]

I know that I could shoot Barnes 168s out of my 12t 300 WSM.
70gr + - RL17 = 3400 + fps

Dean

Holy **** that seems fast. What barrel length? Is that normal, or is rl17 a unicorn powder like rl26 for a 6.5 cm?

 

[BoltActionBrotherhood]

I know that I could shoot Barnes 168s out of my 12t 300 WSM.
70gr + - RL17 = 3400 + fps

Dean

Also which barnes 168s?

 

[FEENIX]

 

[twister]

152 hammer hunter or 151 absolute hammer.

 

[BoltActionBrotherhood]

152 hammer hunter or 151 absolute hammer.

any experience with their 181 grs? Berger's calculator is telling me they would be on the upper end of Marginal stability with an SG of 1.38 even at low altitudes.

 

[twister]

I love the 181 in my win mag. havent shot anything with them yet but they were easy to get shooting well and 3180/3200

 

[scope-eye]

That goes for the TTSX as well as they TSX, I pulled apart one of the rounds I have and the load was 72gr of RL17. With there short bearing surface they tend to be faster, less friction and less pressure signs for some reason, the barrel is a 12t 30" zero free bore. I have had them going even faster than that but I won't get into to that. It is no secret I load my brass like I am mad at it or it pPissed me off, I have a buddy that is proud to say that he gets almost 30 cycles from his 6br brass I typicaly get 3 cycles LOL

Dean

PS: I would like to make something perfectly clear, If I post something it is because I have done it and have done it several times to make sure it wasn't a fluke or a one off. To be truthful I enjoy seeing what I can get away with as far as building pressure that I do shooting targets or varmints

 

[BoltActionBrotherhood]

That goes for the TTSX as well as they TSX, I pulled apart one of the rounds I have and the load was 72gr of RL17. With there short bearing surface they tend to be faster, less friction and less pressure signs for some reason, the barrel is a 12t 30" zero free bore. I have had them going even faster than that but I won't get into to that. It is no secret I load my brass like I am mad at it or it pPissed me off, I have a buddy that is proud to say that he gets almost 30 cycles from his 6br brass I typicaly get 3 cycles LOL

Dean

PS: I would like to make something perfectly clear, If I post something it is because I have done it and have done it several times to make sure it wasn't a fluke or a one off. To be truthful I enjoy seeing what I can get away with as far as building pressure that I do shooting targets or varmints

I'm the same way man. I got my 6.5 Creedmoor to shoot the 153 atips at 3050 fps in a 26 inch barrel.
heavy pressure started at 3000 fps. But before that, it was good to go. The load I landed on was 2910 fps for that powder.

 

[scope-eye]

I originaly built that barrel to shoot 110gr at over 4000 FPS which it does flawlesly, I just kept going up in bullet weight to see what I could get away with the 168gr is as far as I got. I was not really interested in anything heavier than that the speed demon in me won't allow it, and it is also against my religion. LOL

Dean