300 Win Mag 20" recommended twist

[Dave in WI]

Building a 300Win and thinking approx 20-22" barrel threaded for suppressor. 200 to 210 max weight bullets. Will the 10 twist be ok or should I jump to 9?

 

[eddief]

9tw

 

[DaveTooley]

1-10 here.

 

[tobnpr]

^^^ This.
You don't need a 9 unless you're lobbing 200+ grain bullets from a .308/similar. I run 208 ELDM's from my WSM with a 10 twist just fine...

 

[DaveTooley]

212 ELD-X in a 1-10 or me in a 300 PRC

 

[markT]

Maybe work it backwards: only available in 24" BBL

 

[762plinker]

look at the mk13 navy seal rifle, 26" plus a suppressor.
20" is just silly in a win mag
10 twist with both 220 and 230
just one mans opinion

 

[Tommie]

Use a suppressor that’s easy ti clean. A 300 Win Mag with a 20” barrel will be blowing piles of unburned powder out the muzzle.

 

[El Matador]

You'll be fine with a 20" barrel on that 300 Mag. For comparison, a 24" 270 WSM has the same bore volume as a 20" 300 Win Mag. Not many people out there saying you need a 32" barrel on the WSM in order to burn all the powder. i would go with the 9 twist if you're primarily shooting 200's and up.

 

[762plinker]

You'll be fine with a 20" barrel on that 300 Mag. For comparison, a 24" 270 WSM has the same bore volume as a 20" 300 Win Mag. Not many people out there saying you need a 32" barrel on the WSM in order to burn all the powder. i would go with the 9 twist if you're primarily shooting 200's and up.

while i disagree with the 20" a short bbl and a suppressor is going to be messy esp with a heavy bullet