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Forum Index > Rifles general discussion > 25-06 Rem twist rate for 117gr projectiles

25-06 Rem twist rate for 117gr projectiles

17 Oct 2014
@ 11:10 pm (GMT)

Ben Grady

Hi there. I am getting a new barrel for my 25-06 Rem.
My rifle is a P17 action, timney trigger, leupold duel dovetail mounts and leupold scope. My old barrel is pretty rough.
I am replacing it with a chrome moly 26" barrel. I can always cut it back to 24" later if required. What would the best twist rate be? I want to shoot around 117gr projectiles. I have used 117gr Sierra pro hunters and Hornady SST's. Std barrels seem to be 10" twist but some calculators and forums say 9". What do you think? And is 26" barrel the way to go?

Cheers Ben

p.s loved your first two books Nathan, looking forward to getting the latest.

Do you have any opinons on the P17 (M17) actions as the P14 and P17 have not been discussed in your books.

Replies

18 Oct 2014
@ 03:14 pm (GMT)

Nathan Foster

Re: 25-06 Rem twist rate for 117gr projectiles
Hi Ben, I quite like these actions. The design is Mauser based of course- this being adressed in the Mauser section of the book in a generic manner. Apart from this, it really comes down to individual manufacturing- haste of war time production, good days bad days. But much can be addressed during rebarreling so that solves that. Beyond function, I find the action generally pleasing to the eye, especially the bolt handle.

1 1:9 twist makes sense apart from one factor- In my experience, the .257 bore is not one of the easiest to manufacture. Any minor discrepancies in bore tolerances or finish lead to major problems down range where other bore diameters can be more forgiving. In such instances, additional twist simply adds to bullet yaw and instability, the complete opposite of theory. Apart from this, the 1:9 does have merit if you are going to be using 117-120gr bullets exclusively. Tough call really. If possible, talk to the barrel manufacturer as they may have a pet barrel or current button which they may favor based on results and feedback. One phone call or email can offer a great insight, whether that be negative or positive, warning bells or confidence.
18 Oct 2014
@ 05:08 pm (GMT)

Ben Grady

Re: 25-06 Rem twist rate for 117gr projectiles
Thanks Nathan, 10" may be the safer bet for a 25-06 Rem.
What about barrel length? 24" or 26"?
Get a 26" and cut down later if it is annoying.
Will I get anything more from a 26" length than a 24" for this calibre.
A lot of internet thread reading says 24" minimum but 26" is better as the 25-06 is overbore.
I will probably get it threaded for a suppressor as I have a 25cal suppressor already on my .303-25.

cheers Ben


18 Oct 2014
@ 05:47 pm (GMT)

thomas kitchen

Re: 25-06 Rem twist rate for 117gr projectiles
hi ben
there's little bit of info in the knowledge base on 25-06 but dont think it talks bout a 26in barrel
i have a p14 project on the go at moment hope you dont mind if i ask few questions
how do you find the timney trigger?
what stock have you used?
18 Oct 2014
@ 07:55 pm (GMT)

Nathan Foster

Re: 25-06 Rem twist rate for 117gr projectiles
I think that's a really good idea Ben- 26", then cut down to 24" later if you don't like it.

Having said the above, the suppressor might make this a bit of an issue. You would want some meat at 26" before thread cutting. Can be a lot easier at 24". So you need to decide on whether you really want to fit the suppressor or experiment with the longer barrel, or fit a barrel with a bit of heft to it (e.g. True-Flite #2 contour barrel, specifically contoured to suit M14 thread at 26").

Just bear in mind, a #2 barrel in .25-06 is a bit heavier than your average rifle in a larger bore diameter. Don't know if you have ever handled a Sako Finnbear or Ruger semi varmint .25-06 but these were very hefty rifles between #2 and #3. So have a think about how far you want to walk with the rifle. Certainly stout and potentially accurate.

Then again- I don't know what thread is on your .25-08. It may be half inch / 12mm- not really my cup of tea.

Sako AV with 24" TF barrel, #3 contour fluted. The contour duplicates the original but is fluted. Not the lightest but very sturdy.




18 Oct 2014
@ 08:19 pm (GMT)

Ben Grady

Re: 25-06 Rem twist rate for 117gr projectiles
Thanks again Nathan, I think we are looking at a #3 barrel 16mm at the end.
Maybe even 17mm. But I will check this out with the barrel maker and gunsmith first.
19 Oct 2014
@ 02:44 am (GMT)

Ben Grady

Re: 25-06 Rem twist rate for 117gr projectiles
Quote:
hi ben
there's little bit of info in the knowledge base on 25-06 but dont think it talks bout a 26in barrel
i have a p14 project on the go at moment hope you dont mind if i ask few questions
how do you find the timney trigger?
what stock have you used?

Hi Thomas, The Timney sure is an improvement. Fits straight in, Just make sure you get the right one depending on if you keep it as a 6 shot or change to 5 shot. I bought a semi in-letted stock from Boyds USA, added aluminium pillars and glass bedded it, shaped it, true oiled it and fitted a Limbsaver recoil pad and soon a new barrel.
My gunsmith has a P14 300 winmag he built himself and it is the most accurate rifle he has. Hopefully with a new barrel I will be able to say the same thing :-)
Are you keeping it as a .303 or changing the calibre?

cheers Ben
19 Oct 2014
@ 04:32 am (GMT)

thomas kitchen

Re: 25-06 Rem twist rate for 117gr projectiles
hi ben
sounds like what i wanted to hear.
was planning on using timney trigger and boyd stock
rebarrelling in 308 norma magnum using a match grade trueflight barrel when funds allow it.
just doing practice bed in original stock now
if your interested theres a thread on it called "p14 project"
21 Oct 2014
@ 02:13 pm (GMT)

Ben Grady

Re: 25-06 Rem twist rate for 117gr projectiles
Hi Nathan

As you thought the barrel makers does not have the 9" twist gear needed for 25 cal. So 10" twist it is. I am also looking at more a #2 barrel about 15mm at the 26" end as 16mm-17mm will be too heavy. What are your thoughts on my barrel weight/size. I wont be lugging it up hill and over ridges for days on end. Mostly day shoots from forestry/farm track type of shooting. With some longer range shots up t0 400yards on goats. Most shots 0-250yards. I re-load and would like to stretch shots out further on paper. (just for fun). I strive to get it shooting as accurate as possible.

cheers Ben
21 Oct 2014
@ 10:51 pm (GMT)

Nathan Foster

Re: 25-06 Rem twist rate for 117gr projectiles
Hi Ben, #2 will be plenty heavy in this bore diameter. A bit of extra meat at the chamber end can help too (long, wide barrel parallel- if the stock can take it)

I still think you are on the right track. Should be a nice rifle. Really nice.
22 Oct 2014
@ 04:47 am (GMT)

Andy Stewart

Re: 25-06 Rem twist rate for 117gr projectiles
Quote:
Hi Nathan

As you thought the barrel makers does not have the 9" twist gear needed for 25 cal. So 10" twist it is. I am also looking at more a #2 barrel about 15mm at the 26" end as 16mm-17mm will be too heavy. What are your thoughts on my barrel weight/size. I wont be lugging it up hill and over ridges for days on end. Mostly day shoots from forestry/farm track type of shooting. With some longer range shots up t0 400yards on goats. Most shots 0-250yards. I re-load and would like to stretch shots out further on paper. (just for fun). I strive to get it shooting as accurate as possible.

cheers Ben


Hey Ben,

Am assuming your rifle is at Grants? I know he is doing another 2506 at the mo,(as he is for me) and can only do a 10 twist in .257, he is in the process of trueing a Rem 700 action for me, and fitting a #3 contour barrel at 26". Dropping it into a Senator stock and bedding. Each inch of barrel affects velocity in a 2506 far more than other calibres. If you find the barrel heavy, just flute it, I will be fluting mine after I have played with it and judge the balance I want, the other advantage of a proper length barrel in 25 cal is if you want an extra 100 yds clean killing range, you can rechamber to .257 Wby, or .25 Gibbs (the direction I may yet go), going to make a die for hydraulic case forming for that. A contact in Aussie is making me some 130 and 140gn rebate boat tail projectiles to test in the 10 twist, confident about the 130's, be interesting to see how the 140's behave. Projected BC is good, and the SD is great. This rifle will be my Tahr and Chamois getter ( as was my previous 2506 ) .If the custom projectiles don't work as well as I want, my go to bullet will be 115 Berger VLD at 3200, they are dynamite!
22 Oct 2014
@ 03:44 pm (GMT)

Bob Mavin

Re: 25-06 Rem twist rate for 117gr projectiles
G'day Andy
Something to think about. When I had one of my barrels fluted, my gunsmith told me it then had to be de-stressed after fluting. Apparently machining creates stress that affects harmonics as it goes from cold to warm when shooting.
Cheers
Bob
22 Oct 2014
@ 04:38 pm (GMT)

Nathan Foster

Re: 25-06 Rem twist rate for 117gr projectiles
True-Flite have been de-stressing for a while now. Also helps de-stress any button work stress. Yet another step in the learning process for TF over the years.
23 Oct 2014
@ 01:27 am (GMT)

Ben Grady

Re: 25-06 Rem twist rate for 117gr projectiles
My gunsmith is dead against fluting barrels.
30 Oct 2014
@ 03:51 am (GMT)

Ben Grady

Re: 25-06 Rem twist rate for 117gr projectiles
Quote:
Quote:
Hi Nathan

As you thought the barrel makers does not have the 9" twist gear needed for 25 cal. So 10" twist it is. I am also looking at more a #2 barrel about 15mm at the 26" end as 16mm-17mm will be too heavy. What are your thoughts on my barrel weight/size. I wont be lugging it up hill and over ridges for days on end. Mostly day shoots from forestry/farm track type of shooting. With some longer range shots up t0 400yards on goats. Most shots 0-250yards. I re-load and would like to stretch shots out further on paper. (just for fun). I strive to get it shooting as accurate as possible.

cheers Ben


Hey Ben,

Am assuming your rifle is at Grants? I know he is doing another 2506 at the mo,(as he is for me) and can only do a 10 twist in .257, he is in the process of trueing a Rem 700 action for me, and fitting a #3 contour barrel at 26". Dropping it into a Senator stock and bedding. Each inch of barrel affects velocity in a 2506 far more than other calibres. If you find the barrel heavy, just flute it, I will be fluting mine after I have played with it and judge the balance I want, the other advantage of a proper length barrel in 25 cal is if you want an extra 100 yds clean killing range, you can rechamber to .257 Wby, or .25 Gibbs (the direction I may yet go), going to make a die for hydraulic case forming for that. A contact in Aussie is making me some 130 and 140gn rebate boat tail projectiles to test in the 10 twist, confident about the 130's, be interesting to see how the 140's behave. Projected BC is good, and the SD is great. This rifle will be my Tahr and Chamois getter ( as was my previous 2506 ) .If the custom projectiles don't work as well as I want, my go to bullet will be 115 Berger VLD at 3200, they are dynamite!


Hi Andy, what company does Grant work for/own?

Cheers Ben
31 Oct 2014
@ 02:34 pm (GMT)

Nathan Foster

Re: 25-06 Rem twist rate for 117gr projectiles
Hi Ben, Grant is an owner of True-Flite barrel manufacturing.

One word of advice, if the goal is to drive 130-140 grain bullets, the 6.5-06 is the easier option. The bore diameters are extremely close. Following on from this, it would not be any great trick to swage the 140gr .264" A-Max (or SST) down .007" (.18mm) if one was determined to run a 140gr bullet in the .25-06. Twist rate would certainly be a problem though if running swaged .264" bullets in a .25-06.
01 Nov 2014
@ 02:15 am (GMT)

Ben Grady

Re: 25-06 Rem twist rate for 117gr projectiles
Thanks Nathan, I'm happy with the 117gr SST projectiles.
Not Grant at Tru-flite as I'm keen on chrome moly. My gunsmith has Hugh at Stager sports making my barrel. We I guess it's Hugh or another worker, I'm not sure. 26" chrome moly between #2 & 3 contour. Heaps of meat at the chamber end.
How far forward would you bed with a 26" barrel?
Is it over bore?
Any special cleaning/attention with it being over bore.
Is there such thing as over bore?
Any other tips for a P17 action?

cheers Ben

Will post picks when its all done.
 

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