260 rem twist ?

[7mmmag]

I have a 22-250 imp. which has already been trued rem 700 with h-s bottom metal with box mag. I want to re-barrrel to a 260 rem . I am planning to shoot 140 berger,140 a-max . So what twist for these bullets,and 3,4,5, groove. I plan to use pac-nor sendero contour 26''select match. Any input would be appreciated I haven't ever had this caliber. THANKS

 

[DogBuster]

8 twist w/five groove...11* crown...SS SM from Pac Nor....send dummy rd with a Nosler 100 gr BT...,short throat)
don't forget to try the Nosler 140 6.5mm comp bullets...I have two 6.5s from Pac Nor...along with a 6.5 Swede from Tikka...why not the 260 Ackley Imp ?? ...,6.5x308 w/40* shoulder)

 

[7mmmag]

I have considered a 260 imp, How much would be gained vel. and accuracy ?

 

[CatShooter]

I have considered a 260 imp, How much would be gained vel. and accuracy ?

A tiny gain in velocity - no gain in accuracy - and a large gain in the price of dies.

Bummer!!


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[SooStan]

My 1x8 twist Rock barrel shoots the 140 berger VLD very well as well as the 142 Sierra, 139 Lapua and every thing else I have put thru it. Varment weights in the 100 gr. class shoot sub moa too.

 

[7mmmag]

What loads do you recommend for 139-140gr bullets .I am planning to shoot these but all input is appreciated !

 

[FroggyOne2]

I know that you said that you want to use a 26 inch barrel... but consider at least 28 if there is no price difference. Of course, I were using it for F-Class or prone, it would be at least 30 inches. YMMV.. just my thoughts

Frog

 

[Rustystud]

A new barrel in 260 for 1000 yard shooting should be at least 30". This will allow you a 2" setback at 1200-1500 rounds. Throat errosion is almost as bad as a 6.5 X 284. This will give you approximately 3000 round barrel life if you are real lucky. Otherwise your barel life will be considerably less. Barrel life leaves exponentially with rounds down the tube as the throat goes.
Rustystud

 

[7mmmag]

I am planning to try some tactical shooting . I haven't ever done this, will a 30'' barrel be to long? Should I forget the box mag and go with something else. Thoughts on H S stocks ?

 

[CatShooter]

I am planning to try some tactical shooting . I haven't ever done this, will a 30'' barrel be to long?

Yes... I shoot 27" barrels in my two "tactical Match" rifles, and I am 6'4", and they are a bit long for me. A 30" barrel will be a real burden if you are shooting "real" tactical matches.

Should I forget the box mag and go with something else. Thoughts on H S stocks ?

It depends on what you are shooting - it seems like you are trying to build one rifle to do everything. That usually winds up being a rifle that does nothing well.

If you are going to build a "Tactical match" rifle, go with a 24 to 26" barrel, 0.8" to 0.9" muzzle, H-S M24 stock with adjustable LOP, and a standard .260 chamber, and a MK4-M3, or a M3-LR scope... it will be a winning combination.

For "F" class, go with a 30" barrel, and any stock that is comfortable and meets weight limits.
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[7mmmag]

Cat Shooter Thanks I was wondering instead of 260 mabey 7-08. Yes I am going for the tactical match type rifle. I don't have any ranges any where around my aera but I still would like to try and see what happens ! I have a 4.5 X 14 MK 4

 

[CatShooter]

Cat Shooter Thanks I was wondering instead of 260 maybe 7-08. Yes I am going for the tactical match type rifle. I don't have any ranges any where around my area but I still would like to try and see what happens ! I have a 4.5 X 14 MK 4

You could do a 7mm-08, the barrel life would be more than twice as much.

It is a nice cartridge.


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[rhino]

Have you considered a 6.5x55 se? Great brass, more velocity, longer kneck, and just as good accuracy.

RHINOUT!

 

[Tommie]

Cat Shooter Thanks I was wondering instead of 260 maybe 7-08. Yes I am going for the tactical match type rifle. I don't have any ranges any where around my area but I still would like to try and see what happens ! I have a 4.5 X 14 MK 4

You could do a 7mm-08, the barrel life would be more than twice as much.

It is a nice cartridge.


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Wow! I had no idea there was that much difference in barrel longevity between the .260 Rem and the 7-08 Rem. Does barrel life double again when going from a 7-08 Rem to a .308 Win? This is fascinating stuff!

Tom

 

[7mmmag]

I shoot 168gr in my 7mag now. if I went to 7-08 162 A-max or 168 bergers how should I have it chambered short throat?

 

[CatShooter]

Cat Shooter Thanks I was wondering instead of 260 maybe 7-08. Yes I am going for the tactical match type rifle. I don't have any ranges any where around my area but I still would like to try and see what happens ! I have a 4.5 X 14 MK 4

You could do a 7mm-08, the barrel life would be more than twice as much.

It is a nice cartridge.


.

Wow! I had no idea there was that much difference in barrel longevity between the .260 Rem and the 7-08 Rem. Does barrel life double again when going from a 7-08 Rem to a .308 Win? This is fascinating stuff!

Tom

I would not say "Wow... This is fascinating stuff!"

For a given case,or case size) the larger the bore the longer the barrel life, and it goes up very fast.

Consider the barrel life of a 17 Remington and that of a .223 or .222 Mag... probably 6 or 8 times the barrel life, under the same shooting conditions.

I have .308 match rifles that I have shot so much that I have lost track of the rounds through the barrels... but you can burn a .243 in one summer without working hard.


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[Tommie]

It's not that I'm unfamiliar with bore life as it relates to expansion ratio. I find a "wow" factor in a doubling of barrel life with an I.D. increase of only 20 thousandths.

 

[CatShooter]

It's not that I'm unfamiliar with bore life as it relates to expansion ratio. I find a "wow" factor in a doubling of barrel life with an I.D. increase of only 20 thousandths.

Consider the 300 WM... easy to burn up a barrel in 1,500 rounds,or less). Make the same case to a .458 WM, and I think it is physically impossible to burn up the barrel.


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[jthyttin]

Comparing 300WM and 458WM has nothing to do with Tommie's note that your figures for barrel life between different bores were/are a good deal more optimistic than what's generally thought.

 

[CatShooter]

Comparing 300WM and 458WM has nothing to do with Tommie's note that your figures for barrel life between different bores were/are a good deal more optimistic than what's generally thought.

Whatever you say...

... I'm tired of it.


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