A whim...

I didn't need another rifle because I have 4....223, 243, 6.5x55 & 7-08.

But I've had this increasing interest in the 7mmSAUM. It seems an efficient calibre and well suited to a shorter barrel in a light rifle. So I was on the look out for something to convert, and a 270wsm was on the top of my list, because they seem to suit a straight barrel swap to SAUM without any other fiddling.

A couple of weeks ago I happened upon a Stainless A7 in 270wsm. 80 shots through it and 2 years old. $1,200, so I grabbed it. First step completed.

I took it to the range today with a 3-15 Zeiss on it and tried it out with Federal factory ammo. No suppressor, but the recoil was pretty manageable. Sighting in was a breeze with 6 shots to be dead on and zero confirmed. Then a four shot group of one 130 grain and three 150 grain (Fusion). Then a hit on the 400 yard gong.

It shoots so well with factory ammo, I'm now feeling like it can stay as a 270wsm and I will have some fun with it before the new barrel goes on. It might be quite a while.

The mixed bullet weight group:
http://i36.photobucket.com/albums/e4...psftickbua.jpg

Sako A7 would have to be one of the best buys out there. They shoot really well. Not overly fussed with the recoil lug system, but it works.

Would you make any modifications to improve one stug?

Stug did a carbon stock for my short 7-08 A7 and it looks like he epoxied the recoil lug into the stock. It shoots damned well, anyway.

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Originally Posted by sambnz

Would you make any modifications to improve one stug?

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Have it re-stamped a 6.8WSM. Seeing 270 on anything is an instant downer.

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Originally Posted by kiwijames

Have it re-stamped a 6.8WSM. Seeing 270 on anything is an instant downer.

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Funny that.... 0.277 inches = 7.0358mm
You already have a 7mm short magnum.
Typical 270 too. Variety of loads all group in the same place.

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Originally Posted by Shearer

Funny that.... 0.277 inches = 7.0358mm
You already have a 7mm short magnum.
Typical 270 too. Variety of loads all group in the same place.

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Yep, that's the real joke on all the .270 haters, that then say get a 7mm, most aren't bright enough to know, and those that do, are just pissed that the 270 win has thrashed the .280 and .284, in sales volumes by 100-1 or more for 60 years.

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Originally Posted by sambnz

Would you make any modifications to improve one stug?

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As Tahr said I epoxy the recoil lug in place on the stocks I make. Did the same for a friends one, a dirty old 308 and he has shot animals out to 700yds with it.

The .270wsm is awesome loaded with the right bullets. Really shines with 150's at over 3000fps.
Have a Stug stock on my T3 and its a great all round/long range killing machine!

Gotta be happy with that. Prob no 'real' need to rebarrel to 7Saum, other than the saum is 'cooler' than the wsm ;)

I'm sure the 270wsm would be a great performer with the 150 LRAB.

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Originally Posted by GWH

Gotta be happy with that. Prob no 'real' need to rebarrel to 7Saum, other than the saum is 'cooler' than the wsm ;)

I'm sure the 270wsm would be a great performer with the 150 LRAB.

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Yeah. The only thing is that the 270wsm isn't suited to a shorter barrel, where-as I could go to 22"-20" with the 7SAUM and still get pretty good performance with 150 grn.

The 270wsm is threaded so I might get a DPT 7mm suppressor for it and see how unwieldy it makes it. I'm not interested in a brake.

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Originally Posted by Tahr

Yeah. The only thing is that the 270wsm isn't suited to a shorter barrel, where-as I could go to 22"-20" with the 7SAUM and still get pretty good performance with 150 grn.

The 270wsm is threaded so I might get a DPT 7mm suppressor for it and see how unwieldy it makes it. I'm not interested in a brake.

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Ok got ya. Yes, my 7Saum has factory 22" tube and does just on 3k with 162. I'm sure it'd still be very capable with 20"

Sent from my SM-G900I using Tapatalk

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Originally Posted by southernman

Yep, that's the real joke on all the .270 haters, that then say get a 7mm, most aren't bright enough to know, and those that do, are just pissed that the 270 win has thrashed the .280 and .284, in sales volumes by 100-1 or more for 60 years.

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Regarding the .280 Remington there are reasons for that. Warren Page being one of them, Remington underloading the .280 and then changing the name to 7mm Remington Express. Also, trying to market a cartridge with similar ballistics to the well established .270 Win several decades later was never going to make it popular.

I have nothing against the .270 or .280.

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Originally Posted by 10-Ring

Regarding the .280 Remington there are reasons for that. Warren Page being one of them, Remington underloading the .280 and then changing the name to 7mm Remington Express. Also, trying to market a cartridge with similar ballistics to the well established .270 Win several decades later was never going to make it popular.

I have nothing against the .270 or .280.

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I tend to not get parochial or emotional about inanimate things made of lead, copper and brass that only have minimal differences.

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Originally Posted by Tahr

I tend to not get parochial or emotional about inanimate things made of lead, copper and brass that only have minimal differences.

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Good reason to stick with the wsm.

could try the 17 bergers Tahr?

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Originally Posted by Tahr

Yeah. The only thing is that the 270wsm isn't suited to a shorter barrel, where-as I could go to 22"-20" with the 7SAUM and still get pretty good performance with 150 grn.

The 270wsm is threaded so I might get a DPT 7mm suppressor for it and see how unwieldy it makes it. I'm not interested in a brake.

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You should still reach 3000fps with 150's and Retumbo/2225 in a 22" barrel. That's where mine is running with a DPT on the end and I wouldn't be worried about cutting it down to 20" if I felt I wanted it shorter.

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Originally Posted by southernman

Yep, that's the real joke on all the .270 haters, that then say get a 7mm, most aren't bright enough to know, and those that do, are just pissed that the 270 win has thrashed the .280 and .284, in sales volumes by 100-1 or more for 60 years.

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Actually.... I couldn't give a toss about sales volume, if you follow the masses as a policy you tend not to be

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bright enough to know

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...... I do however care about projectile choice. There are some options available now for the 270, but you have to ask the question .... if the 270 actually kills in sales, why don't the projectile manufacturers develop for it? And the answer is.... it used to kill in sales (but no more), and its limited in cartridge case options to either the 270 Win or the 270 WSM and thats about it....

If projectile choice improves then its right in the zone of 6.5-7mm for high BC projectiles @ 120-160gr which is all we need to effectively deal with real life hunting requirements in this country, without having the recoil, noise and weight issues created by high BC options in 30 cal and above....

I was going to pick that rifle up too @thar.. am keen to do a 6.5 SAUM.... but might have ended up doing exactly the same and using it as is.... lol the LRAB looks OK...

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Originally Posted by Gibo

could try the 17 bergers Tahr?

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What do you mean by "17" Gibo?

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Originally Posted by Tahr

What do you mean by "17" Gibo?

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ha chuck a 0 on the end :yaeh am not durnk:

Why would the WSM be any worse with a short barrel than the SAUM?

Larger case should provide more velocity loaded appropriately in any barrel length.

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Originally Posted by veitnamcam

Why would the WSM be any worse with a short barrel than the SAUM?

Larger case should provide more velocity loaded appropriately in any barrel length.

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I think its to do with efficiency and expansion ratios. The ratio between the bullet diameter and powder capacity dictates how efficient a combination is. By efficient I mean the loss of velocity per inch of barrel and per grain of powder. e.g. the 25-06 is less efficient than a 30-06, thus requires a longer barrel to achieve optimal performance.

The WSM has a smaller bullet diameter and larger case capacity when compared to the SAUM. So in terms of efficiency, the SAUM wins.

The same with the 22.243 and the .223. When both fired out of a 20" the 22.243 uses a heap more powder to get a similar outcome.

So, if you start hacking the 270WSM barrel you are soon back to 270W performance, but using 10 grns more powder, getting more blast, more bang, and more barrel wear.

I made most of that up, but I think that's how it works.

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Originally Posted by Tahr

I think its to do with efficiency and expansion ratios. The ratio between the bullet diameter and powder capacity dictates how efficient a combination is. By efficient I mean the loss of velocity per inch of barrel and per grain of powder. e.g. the 25-06 is less efficient than a 30-06, thus requires a longer barrel to achieve optimal performance.

The WSM has a smaller bullet diameter and larger case capacity when compared to the SAUM. So in terms of efficiency, the SAUM wins.

The same with the 22.243 and the .223. When both fired out of a 20" the 22.243 uses a heap more powder to get a similar outcome.

So, if you start hacking the 270WSM barrel you are soon back to 270W performance, but using 10 grns more powder, getting more blast, more bang, and more barrel wear.

I made most of that up, but I think that's how it works.

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Well yes but the wsm should be faster and if you were worried about efficiency rather than speed you would use a 7mm08 or neck up a 223 :) that would be efficient as :thumbsup:

If you want shorter and was thinking of rebarreling anyway why not hacksaw (if you have nothing better that is) a few inches off it and see what can be achieved, not like a second hand 270 barrel has a huge resale value.

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Originally Posted by veitnamcam

Well yes but the wsm should be faster and if you were worried about efficiency rather than speed you would use a 7mm08 or neck up a 223 :) that would be efficient as :thumbsup:

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And theres nothing wrong with that ;)

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Originally Posted by Tahr

I think its to do with efficiency and expansion ratios. The ratio between the bullet diameter and powder capacity dictates how efficient a combination is. By efficient I mean the loss of velocity per inch of barrel and per grain of powder. e.g. the 25-06 is less efficient than a 30-06, thus requires a longer barrel to achieve optimal performance.

The WSM has a smaller bullet diameter and larger case capacity when compared to the SAUM. So in terms of efficiency, the SAUM wins.

The same with the 22.243 and the .223. When both fired out of a 20" the 22.243 uses a heap more powder to get a similar outcome.

So, if you start hacking the 270WSM barrel you are soon back to 270W performance, but using 10 grns more powder, getting more blast, more bang, and more barrel wear.

I made most of that up, but I think that's how it works.

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Think you are dead right @Tahr in your theory but the difference in bore volume between the .277 and .284 bore is negligible and overall capacity (case and bore) can be managed with the speed of the powder. As long as you don't need to shoot heavier bullets than they make in 270 I'm not sure it will make much difference.