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.30-06: Recommend a twist rate and chamber reamer?

S

SWThomas

Sergeant
Full Member
Minuteman
Jan 23, 2013
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Fort Lee, VA
I'm having my .30-06 Rem 700 rebuilt. The barrel will be a 26" Bartlein. I will be shooting 165-210 grain bullets. What twist would you go with?

1:10

or

1:11.25

Any recommendations on a chamber reamer? This will be a precision rifle that will see some occasional hunting use. I want the most precise chamber I can get. I will be handloading the ammo for it.
 
I would say either. I know it's not much help but guys have run 208s out of a .308 with a 12 twist. Most '06 have 10t but either will stabilize that range of bullets no problem. I have a spare 11.27 barrel that I had thought about building an '06 with. Safe side would be 10t....
 
Call Dave at PTG. He will best answer your question on reamer. I would guess match of course but with that broad of range in bullets your gonna have to compromise. Need a longer throat for the heavies which buts the 168s away from the lands. As long as the lighter bullets are more jump tolerant, ie not VLDs, you should be fine with a longer throat
 
I'm building mine with a 1-10 twist and Serengeti reamer based on German Salazars recommendations.
 
+1 on PTG There is a great article on building a 30-06 on riflemansjournal.blogspot.com just google "remington 30-06 barrel twist" and you should find the article it is written by German A. Salazar
 
OG10 said:
+1 on PTG There is a great article on building a 30-06 on riflemansjournal.blogspot.com just google "remington 30-06 barrel twist" and you should find the article it is written by German A. Salazar
Click to expand...

That's the article I'm basing most of my research on. He says 11 twist is optimal for bullets up to 210. I'm just trying to see what everyone thinks.
 
SWThomas said:
That's the reamer I'm currently looking into. How much did it cost and how fast did they get it to you?
Click to expand...

Didn't cost me a thing. I'm having German's gunsmith do the build because I knew he had the reamer and has a good reputation in the competition circle. I'm using a Stiller Predator action with the extra long box magazine cut as well so I shouldn't have to worry about seating depths.
 
Scout Supply is building mine, I decided on 25" (m24 profile 11.27tw Rock 5r) and he (Russell) has a Serengeti reamer

Sent from my DROID RAZR HD using Tapatalk
 
Last edited:
I'd go with 1:10 twist.

I had my own reamer made off of a dummy round using the 208 amax..
 
Built my '06 with a 10 twist Rock M24/40 profile. My smith went with an Obermyer reamer, Im not disappointed at all but my next barrel will have the Serengeti chamber in order to see if here is a difference in accuracy.
 
Last edited:
SWThomas said:
I'm having my .30-06 Rem 700 rebuilt. The barrel will be a 26" Bartlein. I will be shooting 165-210 grain bullets. What twist would you go with?

1:10

or

1:11.25

Any recommendations on a chamber reamer? This will be a precision rifle that will see some occasional hunting use. I want the most precise chamber I can get. I will be handloading the ammo for it.
Click to expand...

1-10 twist. The 1-11.25 would be on the ragged edge of being stable with the 210's. Some guys can get away with it and some cannot. Depends on where you shoot. Altitude, temp., velocity etc.....

Serengeti reamer like has been mentioned.

Later, Frank
Bartlein Barrels
 
Is there any negative side to going with a 1:10 and not shooting heavy bullets?

Being that I'll have to narrow it down for the reamer selection, I'm going to shoot 175g match bullets and 180g Barnes TTSX for hunting.
 
.30-06: Recommend a twist rate and chamber reamer?

My 1:11.2 (Serengeti chamber) won't stabilize 200LRX but does 200GK and 200Amax and 200AB and 190VLD. I'm at near sea level.
 
Blackbrush said:
My 1:11.2 (Serengeti chamber) won't stabilize 200LRX but does 200GK and 200Amax and 200AB and 190VLD. I'm at near sea level.
Click to expand...

So are you happy with that twist? Or would you go with a 10 if you had it to do over?

If an 11.2 will stabilize those bullets, it should have no problem with the bullets I'm planning to shoot.
 
I don't think the 10 would hurt really. I wish I could shoot the 200LRX. Going to try the 175LRX when I can find some. The 210ABLR may also be too long for a 1:11. Salazar says BC is like a diamond. 24" 5R Rock tube btw.
 
Get a 10 twist that way you WILL be able to shoot a wider variety of bullets. No sense in limiting yourself if you know you are going to shoot the heavies....
 
The Barnes 180 TTSX if memory serves me correctly need something a little faster than a 1-11. I would stay the course of a 1-10.

It's not the bullet weight that dictates twist.......it's the bullets length that dictates twist. Yes normally the heavier the bullet the longer it is but not all the time. The solid bullets for example that 180gr. is typically longer than a 180gr. with a lead core. The lead core is denser/heavier and will make the weight easier than a copper solid. So to get the copper solid it 180gr. it ends up being a longer bullet in the same caliber.

Will a 1-10 twist hurt you with a lighter bullet/shorter jacket length bullet? As long as you are shooting good quality bullets/ammo with minimal run out my answer is not really. The crappier the ammo/bullets with more run out the faster twist will amplify the run out and that's what makes your groups go sour.

Later, Frank
Bartlein Barrels
 
Can you guys tell me if I will be able to load rounds to the lands with this chamber and still have them fit an internal magazine?
 
SWThomas said:
Can you guys tell me if I will be able to load rounds to the lands with this chamber and still have them fit an internal magazine?
Click to expand...

208 Amax, maybe. Some of the sleeker bullets like a 210 Berger, definitely not. That's why I went with something that uses an extended magazine.
 
Due to the revelations in this thread, I'm not going to shoot anything over 190g. I'll probably be sticking with the 168 and 178 AMAX. I'm currently having the rifle built to accept a 300WM detachable mag so I can load rounds to the lands if I want to. I'm just curious if I can still do that with an internal mag...
 
The serenghetti reamer was built for the heavies with a .180" free bore (I think). With 300win mag AICS mags you should have plenty of room to get to the lands.... Room for throat burn and still have enough neck to support the bullet... Maybe, probably....

Given your parameters I see no reason not to shoot 200gr class bullets especially with a freebore that will support seating the 208/210s out of the powder column...
 
SWThomas said:
Is there any negative side to going with a 1:10 and not shooting heavy bullets?

Being that I'll have to narrow it down for the reamer selection, I'm going to shoot 175g match bullets and 180g Barnes TTSX for hunting.
Click to expand...

What are your intended targets for game? There hasn't been one animal in Alaska I haven't been able to cleanly kill with a 208 amax.. Except for grizzly bear which I used a 200gr accubond for various reasons.....
 
That seems a bit short but Thanks for the correction.....What's your coal distance to the lands with a 208 amax?
 
I just found the reamer print.... I stand corrected... That being said you can still use 200gr class bullets... I have done it in shorter throated chambers. Not optimal but given the right powders you should still have ample velocity..

With a .086" freebore and 300win mag magazines you will DEFINITELY. Be able to touch the lands with any of your bullet selections with exception of maybe the 110gr class bullets....
 
Dont forget about the 215g berger hybrid as well. I have read that folks can push it faster than the 208's... and another reason to go 1:10
 
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