Which 300 Norma Mag Twist????

[DJ Fergus]

No less than 8 & no more than 9. I would go 8 if you thought that you would want to use the 250 A tip.

 

[L.Sherm]

Animals both for that matter.
I know a 220 Berger did not make it to target last year in a 9tw in a 300NMI

 

[L.Sherm]

Take into consideration also as the throat wears the more you spin them the harder it is on jackets

 

[L.Sherm]

Ask the majority of guys who shoot the 300wsm in BR why they shoot 10tw with 210-215 and 230

 

[Huntnful]

Ask the majority of guys who shoot the 300wsm in BR why they shoot 10tw with 210-215 and 230

Thank you for this great info!! I went with a 9 twist to shoot the 230's and 199 Hammer Hunters. But I did intend to test 215's also. I guess i'll find out!

 

[Shane Lindsey]

Animals both for that matter.
I know a 220 Berger did not make it to target last year in a 9tw in a 300NMI

Do you know how fast they were pushing them?

I am no where close to fast enough with my 8tw 300 RUM with 245s. But it shoots the 215 as well. I could see where less mass being affected? That said, they are right under 3000 FPS-super slow barrel.

 

[L.Sherm]

3150 ish

 

[L.Sherm]

If you run the numbers with the New 10 shot 1000 yard BR world record its got an SG of 1.5

 

[schmi015]

Don't go faster than 1/9. Army has been having some issues with their 1/8's. Bullets spinning apart...

 

[Ron Milby]

9 twist works great in my 300 Norma Mag and 300 Norma Mag Imp. I shoot Berger 230s.

 

[Pro2A]

I fixing to put together a rifle in 300 Norma Mag shooting the 230 Berger Hybrid OTM's in it. I live at 500' elevation in Texas but it will only be used in 6000' of elevation or higher. My 300 Win mags all use the 215's with 1:10's. They do just fine. I want this one to shoot the 230's. Stay with 1:10 got with 1:9.4 or 1:9??? I leaning one way just wanted to here from some Norma shooters.

My Barrett MRAD MK22 300NM is 1:8; 338NM is 1:9.4. These twists will handle any heavy-for-caliber bullets available. A LOT of development went into these barrels. Military applications......300 is for personnel engagements; 338 for anti-material, slated to replace the .50BMG role. Haven't yet encountered over spinning the 300 with 1:8 as shared above.

 

[Rick Richard]

9 twist works great in my 300 Norma Mag and 300 Norma Mag Imp. I shoot Berger 230s.

Me too in Norma 300 Mag Improved.