300 wsm: 1-10, 1-9.5, or 1-9 twist

[Freediver111]

I’m sticking to the 200 grain bullets and heavier for this gun. Mainly looking at trying the 212 Eld-x and 215 Berger’s, preferably the 212 Eld-x.
My gut is thinking I should be ok with a 1-9.5 twist for both of those bullets, but not sure what the general consensus is. I have heard of the jacket coming apart on the Hornady ELD-M with too high of a twist, but not sure if that’s just internet rumors.

 

[223762]

Get a 9.5 twist. Well probably be in the 2700-2750ish range for velocity. You are in the lower 200k for RPM. Also look at getting 5R over conventional 4 groove. The 5R well help with jacket failures.

 

[mmlj]

If possible, try doing some research on what twist other competitive shooters are using in your caliber. Discussing this with barrel manufactures may also provide some insight. My 300 WSM is a hunting rifle with 1-10 twist and I've never seen the need for anything over 200gr. for the animals I hunt. However, the old adage of going with a faster twist considering the bullet weights up to 240gr., etc. might be a better choice.

 

[Freediver111]

If possible, try doing some research on what twist other competitive shooters are using in your caliber. Discussing this with barrel manufactures may also provide some insight. My 300 WSM is a hunting rifle with 1-10 twist and I've never seen the need for anything over 200gr. for the animals I hunt. However, the old adage of going with a faster twist considering the bullet weights up to 240gr., etc. might be a better choice.

This is going to be a hunting rifle, but will cover primarily moose, elk, and bear. Sure you can kill a moose with a 180 gr, but I prefer to pack a heavier bullet in the 200-225 range when grizzlies are around.

 

[CRT2]

Berger Twist Rate Calculator shows 1/10 twist for 230 gr target hybrid at 32 degrees, 4500 feet and 2750 FPS. Below 4500 feet bullet would be less stable, per their calculator.

 

[jbuck88]

I run a 1/10 on my 300wsm and shoot 200gr TLR bullets without a problem.

 

[Frank Green]

A 10 twist will be fine for the bullets you are talking about.

If you went heavier on the bullet weight....then I'd be getting a faster twist.

Later, Frank
Bartlein Barrels

 

[BruntBronze]

I’m sticking to the 200 grain bullets and heavier for this gun. Mainly looking at trying the 212 Eld-x and 215 Berger’s, preferably the 212 Eld-x.
My gut is thinking I should be ok with a 1-9.5 twist for both of those bullets, but not sure what the general consensus is. I have heard of the jacket coming apart on the Hornady ELD-M with too high of a twist, but not sure if that’s just internet rumors.

id go with 9.5 twist, without knowing your barrel length, so the heavier pills can be used.

 

[msstate56]

1-10 PROOF is what I use on mine with 200 ELD-x. It works quite well to 1K

 

[Freediver111]

id go with 9.5 twist, without knowing your barrel length, so the heavier pills can be used.

Looking at 24” plus a brake.

 

[BruntBronze]

since 24" will have less mv then the 9.5 twist. i asked the company that made my 308 if the would replace the barrel, at my cost, for one with a 10:1 instead of 11.75:1...they laughed.

 

[BruntBronze]

1-10 PROOF is what I use on mine with 200 ELD-x. It works quite well to 1K

whats your barrel length and cartridge? im considering 300 prc or any dia RUM.

 

[wade2big]

My 26” .308 win is a 1-9” and shoots factory FGMM 175gr at 2750fps into small clusters. If I was going to build a 300prc, 300 wm, or 300wsm, it would be a 1-9”. If it won’t over spin the lighter stuff then I couldn’t imagine a 1-9” overspinning the heavies.

 

[SingleShot85]

Have been running 10 twist for years 150s-200s. There in no since running anything over 200 grains in a short mag. The velocity loss is just not worth it. You cross the 200gr mark just step up to a full length magnum. But that’s just me

 

[msstate56]

whats your barrel length and cartridge? im considering 300 prc or any dia RUM.

300 WSM, 24” Proof CF TL3 prefit, Hornady factory precision hunter 200 ELD-x. Going 2820fps.