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

S

SWThomas

Sergeant
Full Member
Minuteman
Jan 23, 2013
486
3
45
Fort Lee, VA
#1
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.
 
#5
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....
 
#7
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
 
#9
+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
 
#11
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.
 
#12
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.
 
#15
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:
#17
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
 
#18
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.
 
#25
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
 
#29
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...
 
#31
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...
 
#32
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.....
 
#35
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....
 
You must log in or register to reply here.

Similar threads

Keith Johns
Accessories Chamber reamers for sale
Replies
9
Views
648
Keith Johns
Keith Johns
tlsmith22
Recommendations on a 7 saum build
Replies
2
Views
342
Maurygold
M
M
LA Remmington 700 Bolt won’t close.
Replies
10
Views
400
Terry Cross
Terry Cross
Tperry
SOLD Chamber reamers for sale
Replies
0
Views
197
Tperry
Tperry
I
Help with decision on replacing barrel or new rifle
Replies
11
Views
804
Imurhuckleberry
I
Top Bottom
Back
Home
Forums
Merch
Alerts