What barrel profile/ twist rate?

[Encore4me]

Going to get a new barrel for my suppressed Tikka T3x 300 WM. Want to go 20”. I am pretty set on a preferred barrel and having them screw it on. Weight is not too much of a concern. I will probably shoot 180gr rounds for now until I can get my reloading stuff set back up in a year or two.

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[WeiserBucks]

Get the heaviest barrel you're willing to carry and 10 twist.

 

[HandgunHTR]

For PBB, I am a fan of their .750” taperless profile. I get mine fluted, purely for aesthetics.

10 twist for the WM

 

[wind gypsy]

Lite hybrid is a fantastic hunting rifle contour. 750 taperless or lite Palma are good progressively heavier options.

 

[06 SB]

I went with a 22” Pacnor #4 with 5 flutes for my 338Fed. It is about as light/small as you can go and still have a shoulder. I have had a Diligent Defense DTF STi 8.6 suppressor on order for a few months now so hopefully my rig will be complete soon!

Personally, I would twist it for longer bullets with better BCs. So 9 twist or some fraction thereof.

 

[Article 4]

10 twist is a pretty traditional rate for 300 WM however in this case I recommend a 9.25 or a 9 when running that short a barrel - spinning it just a bit more will give it better stability if you plan on reaching out longer distance.

 

[SDHNTR]

9.5tw and a Bart 3b.

 

[D Lee]

Let me say this right up front...I wish I understood all this as much as you do. I don't doubt each of you is 100% correct and totally respect your preferences.

Can someone pls share with me why a 300 WM in a 20" barrel? Unless it's just for convenience / weight consideration?? Seems to me a 30-06 or even a .308 with a 20" barrel would do everything in the field the 300 WM would with close muzzle FPS / same accuracy / less recoil / muzzle blast. What am I missing here?

Thanks!

 

[WeiserBucks]

Let me say this right up front...I wish I understood all this as much as you do. I don't doubt each of you is 100% correct and totally respect your preferences.

Can someone pls share with me why a 300 WM in a 20" barrel? Unless it's just for convenience / weight consideration?? Seems to me a 30-06 or even a .308 with a 20" barrel would do everything in the field the 300 WM would with close muzzle FPS / same accuracy / less recoil / muzzle blast. What am I missing here?

Thanks!

Larger cartridges will always be faster than smaller cartridges at any given barrel length using the same bullets.

 

[ckleeves]

^Because packing a 24” or 26” barreled rifle with a suppressor will have you thinking about nothing else but how much it sucks the entire time.

 

[D Lee]

Larger cartridges will always be faster than smaller cartridges at any given barrel length using the same bullets.

WB...NOT arguing with you. Trying to learn here.

My entire life...skipping the 20" convenience factor...I've read / studied a 300 WM prefers a 26" barrel with a minimum 24" to hold onto the fps advantages. To say that 4" to 6" LESS barrel length does not costs us fps???

Please clarify.

Thank you.

 

[Axlrod]

WB...NOT arguing with you. Trying to learn here.

My entire life...skipping the 20" convenience factor...I've read / studied a 300 WM prefers a 26" barrel with a minimum 24" to hold onto the fps advantages. To say that 4" to 6" LESS barrel length does not costs us fps???

Please clarify.

Thank you.

A 300WM w/20" is faster than a 308, 30-06 w20"

 

[WeiserBucks]

WB...NOT arguing with you. Trying to learn here.

My entire life...skipping the 20" convenience factor...I've read / studied a 300 WM prefers a 26" barrel with a minimum 24" to hold onto the fps advantages. To say that 4" to 6" LESS barrel length does not costs us fps???

Please clarify.

Thank you.

Every cartridge will be slower with a shorter barrel. If someone wants a shorter barrel and still have highish velocity they go with a larger cartridge. Magnums have historically had longer barrels to maximize velocity potential but many shooters appreciate a shorter barrel for reducing overall length with a suppressor attached.

Those of us using shorter magnums don't care about efficiency or what gun magazine writers tell us to do. We want a shorter rifle and need enough muzzle velocity to get our chosen bullet to our maximum effective range.

 

[Article 4]

Let me say this right up front...I wish I understood all this as much as you do. I don't doubt each of you is 100% correct and totally respect your preferences.

Can someone pls share with me why a 300 WM in a 20" barrel? Unless it's just for convenience / weight consideration?? Seems to me a 30-06 or even a .308 with a 20" barrel would do everything in the field the 300 WM would with close muzzle FPS / same accuracy / less recoil / muzzle blast. What am I missing here?

Thanks!

You wish you understood it better and then state you doubt each of us is 100% correct? Anyone else see a fallacy in that statement.

To answer your second question. no, neither the 06 or 308 is ballistically comparable to the 300wm. period. dot

 

[Article 4]

^Because packing a 24” or 26” barreled rifle with a suppressor will have you thinking about nothing else but how much it sucks the entire time.

I run every rifle i have suppressed with the shortest bbl being a 24

Most of the guys i hunt with do the same.

Where you hunt matters. Out west we are trying to eeek out every last ballistic advantage to ensure we can make longer shots. Where we live shots are usually either 150 yards or 800+. One you get accustomed to running it, length is not really a big deal

 

[D Lee]

You wish you understood it better and then state you doubt each of us is 100% correct? Anyone else see a fallacy in that statement.

To answer your second question. no, neither the 06 or 308 is ballistically comparable to the 300wm. period. dot

A4...

1) Out of respect, I agreed on not understanding at the posters levels.
2) I asked (politely) because what was stated was contrary to what I'd been taught for 50 years. Nothing more than that.
3) Ballistically comparable? Yes, they are comparable. Just not the same. Each has it's advantages / disadvantages. I've owned / used / hunted with all 3, likely longer than you've been alive.

Have a good day.

 

[WeiserBucks]

A4...

1) Out of respect, I agreed on not understanding at the posters levels.
2) I asked (politely) because what was stated was contrary to what I'd been taught for 50 years. Nothing more than that.
3) Ballistically comparable? Yes, they are comparable. Just not the same. Each has it's advantages / disadvantages. I've owned / used / hunted with all 3, likely longer than you've been alive.

Have a good day.

If you want every last bit of performance possible in a 20", 308 and '06 are not comparable to a WM, RUM or Norma. It's not the best choice for everyone, but it's the best choice for some people.

 

[BBob]

To add to other replies: A #5 at 20" would be ~.760" at the muzzle. About perfect threading for 5/8-24.

 

[wind gypsy]

10 twist is plenty. OP has tikka bottom metal meaning 215 Bergers wouldn’t even fit in the mag without the ogive being inside the case mouth and 215 Berger’s stabilize fine with a 10.

You wish you understood it better and then state you doubt each of us is 100% correct? Anyone else see a fallacy in that statement.

To answer your second question. no, neither the 06 or 308 is ballistically comparable to the 300wm. period. dot

Read again. He said I don’t doubt each of you is correct.

 

[Article 4]

A4...

1) Out of respect, I agreed on not understanding at the posters levels.
2) I asked (politely) because what was stated was contrary to what I'd been taught for 50 years. Nothing more than that.
3) Ballistically comparable? Yes, they are comparable. Just not the same. Each has it's advantages / disadvantages. I've owned / used / hunted with all 3, likely longer than you've been alive.

Have a good day.

Points 1 and 2. fair

Point 3. Still no. No. and No

Merry xmas.