Firearm & Gun Forum - FireArmsTalk.com > Long Guns > General Rifle Discussion > Have 300WSM and .270 Win - Those enough without getting a .308?

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Old 10-06-2012, 01:54 PM   #11
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Heck no, get a .308 Win. too...............

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Old 10-06-2012, 01:55 PM   #12
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Honestly, IMO if you are talking strictly about capabilities, you could get rid of one of your current rifles and not miss it. The .308-.270-.300 all overlap in capability. The .300WSM may edge the other two out in max range, the .308 generally has the least expensive ammo but there is little or nothing practical you can do with one that can't be done with the other.

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Old 10-06-2012, 02:00 PM   #13
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Originally Posted by jpattersonnh View Post
How can you use the same load when the 2 have nothing in common except the base diameter??
You're ridiculous!
"(using sane loads.)"


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Originally Posted by jpattersonnh View Post
Here is actual data, now the .270 is using a 160gr while the .308 is using a 168gr match as there are no match bullets for .270. MV in the .270 is 2650, .308 is 2700. I am rounding both down. The .270 by 30fps and the .308 by 50fps because no one uses max loads often.
There is no "actual data" there. Tell you what; I'll use a "sane load;" the 270 load you've presented is obviously geared to fail.
I'd use a 150g SST with a BC of .525 traveling at 3000fps.
You can use a 168gr Match King with a BC of .462.

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Bullet drop in inches...
Why do you think drop is relevant? (Other than needing to know it.)
Like I've said, (and you've conveniently ignored,) when the round's speed reduces to transonic, and how well the projectile cuts wind; that is what is important in a long range rifle.
High BC in conjunction with high velocity, cut wind. Higher BCs and higher velocity gets you further before going transonic. The 270 trumps the 308 in both categories!

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Not sure what physics you were talking about that pertain to accuracy. They both shoot pretty even. I'm not seeing a 300 yard advantage at all. All loading data is from the Hodgdon site, everything calculated on a JBM calculator.
Oh I see, you want to make this into a, "The transonic problem" is a myth!" arguments.... good luck with that.

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Originally Posted by jpattersonnh View Post
The long bullet of the .270 may perform better on game at distance, but not on paper.
When you use "sane" data it does... specific sane data.
Your 308 load hits transonic about 950 yards; with a 90º 10mph wind, your drift is 93".
My 270 load gets me 1250 before going transonic; my wind drift at your limit, 950 yards is 66 inches; about 2/3 of yours;whereas miscalculations in drift are more forgiving.

That's the kind of "physics" I'm "talking about."
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Old 10-06-2012, 05:00 PM   #14
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Well done kid

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Old 10-06-2012, 05:21 PM   #15
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Thanks for all, the great feedback.

The 300WSM with a Limb Saver is pretty workable.

My hope is that the 270 Win will be a little tamer and an overall different shoot.

Between the two I was hoping for a good mix, and it sounds like even with the overlap, I'll have that. The 270 is no wimpy little rifle, and the 300 is a bit more of a beast. I should be good to go.

The 308 sounds like it would just be redundant in terms of shooting, so I'm glad to know I'm not missing out.

Again, appreciate the feedback.

I'll just tell my bud, that if I'm going to scope out mob bosses for rubbing out, I'm covered either way and the 308 won't give me any advantage over what I already have.

And then I'll mention to him - "By the way, for hunting, same thing applies"

That ought to shush him up.

Happy shooting

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Old 10-06-2012, 07:43 PM   #16
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Quote:
Originally Posted by The_Kid View Post
You're ridiculous!
"(using sane loads.)"




There is no "actual data" there. Tell you what; I'll use a "sane load;" the 270 load you've presented is obviously geared to fail.
I'd use a 150g SST with a BC of .525 traveling at 3000fps.
You can use a 168gr Match King with a BC of .462.


Why do you think drop is relevant? (Other than needing to know it.)
Like I've said, (and you've conveniently ignored,) when the round's speed reduces to transonic, and how well the projectile cuts wind; that is what is important in a long range rifle.
High BC in conjunction with high velocity, cut wind. Higher BCs and higher velocity gets you further before going transonic. The 270 trumps the 308 in both categories!


Oh I see, you want to make this into a, "The transonic problem" is a myth!" arguments.... good luck with that.


When you use "sane" data it does... specific sane data.
Your 308 load hits transonic about 950 yards; with a 90º 10mph wind, your drift is 93".
My 270 load gets me 1250 before going transonic; my wind drift at your limit, 950 yards is 66 inches; about 2/3 of yours;whereas miscalculations in drift are more forgiving.

That's the kind of "physics" I'm "talking about."
The data I've put forward is correct, what you say, is here say. Your opinion.

You claim your .270 stays supersonic to 1250 yards. With what powder?? You have given zero data. I gave you all the numbers and source. Do the same and educate me. I know the .270 is a great round, but you have not proved why. As far as why the drop is relivent, seriously?

Talking equal, there is no data thet shows a 150gr sst at 3000fps, you are close to 100fps from any data I have. the fastest load is 2900, most are closer to 2700fps. You must know more then I ever will. I do hot rod a bit , but seriously! 200fps on the median side is extreme. Please tell me were this data is from. Your is not Sane data, but then again, you've given none.

OK w/ both shooting 150gr SST, at 2900fps, the .270 has a velosity of 1.24 mach, the .308, 1.02 mach, at 1000 yards. The advantage of the .270 is the energy it retains which is about 200fpe at 1000 yards.

I just pulled out Hornady 7th edition, max .270 is 2900fps w/ only 2 powders, 8 are at 2800fps, 2 are 2700fps out of all 12. They also list 12 loads for .308. 2 at 2800fps, 8 at 2700fps. Speer 14 lists 2 .270 at 2900fps, 3 at 2800fps, 3 at 2700fps, and 4 at 2600fps. They also list for .308 2 at 2900fps, 5 at 2800 fps, 4 at 2700fps, and 2 at 2600fps using 150gr.
I'm really curious how you get 3000fps when I find no data to support it. Please give the source. Just really curios.
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Old 10-06-2012, 07:45 PM   #17
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Well done kid
No data, just bravado!! He has given zero to back up what he claims.
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Old 10-06-2012, 07:54 PM   #18
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Quote:
Originally Posted by SubZero View Post
Thanks for all, the great feedback.

The 300WSM with a Limb Saver is pretty workable.

My hope is that the 270 Win will be a little tamer and an overall different shoot.

Between the two I was hoping for a good mix, and it sounds like even with the overlap, I'll have that. The 270 is no wimpy little rifle, and the 300 is a bit more of a beast. I should be good to go.

The 308 sounds like it would just be redundant in terms of shooting, so I'm glad to know I'm not missing out.

Again, appreciate the feedback.

I'll just tell my bud, that if I'm going to scope out mob bosses for rubbing out, I'm covered either way and the 308 won't give me any advantage over what I already have.

And then I'll mention to him - "By the way, for hunting, same thing applies"

That ought to shush him up.

Happy shooting
Your covered. Is the Mob boss from Chicago??
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Old 10-07-2012, 12:26 AM   #19
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Quote:
Originally Posted by jpattersonnh

The data I've put forward is correct, what you say, is here say. Your opinion.

You claim your .270 stays supersonic to 1250 yards. With what powder?? You have given zero data. I gave you all the numbers and source. Do the same and educate me. I know the .270 is a great round, but you have not proved why. As far as why the drop is relivent, seriously?

Talking equal, there is no data thet shows a 150gr sst at 3000fps, you are close to 100fps from any data I have. the fastest load is 2900, most are closer to 2700fps. You must know more then I ever will. I do hot rod a bit , but seriously! 200fps on the median side is extreme. Please tell me were this data is from. Your is not Sane data, but then again, you've given none.

OK w/ both shooting 150gr SST, at 2900fps, the .270 has a velosity of 1.24 mach, the .308, 1.02 mach, at 1000 yards. The advantage of the .270 is the energy it retains which is about 200fpe at 1000 yards.

I just pulled out Hornady 7th edition, max .270 is 2900fps w/ only 2 powders, 8 are at 2800fps, 2 are 2700fps out of all 12. They also list 12 loads for .308. 2 at 2800fps, 8 at 2700fps. Speer 14 lists 2 .270 at 2900fps, 3 at 2800fps, 3 at 2700fps, and 4 at 2600fps. They also list for .308 2 at 2900fps, 5 at 2800 fps, 4 at 2700fps, and 2 at 2600fps using 150gr.
I'm really curious how you get 3000fps when I find no data to support it. Please give the source. Just really curios.
The data you find in the books are all shot from a test rifle with x length of barrel, with x number out twists, but considering no two barrel are the same and a longer barrel retains a little more velocity than shorter barrels. He could very well achieve 3000 fps. I'm not saying he did but it is possible.
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Old 10-07-2012, 04:49 AM   #20
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The data you find in the books are all shot from a test rifle with x length of barrel, with x number out twists, but considering no two barrel are the same and a longer barrel retains a little more velocity than shorter barrels. He could very well achieve 3000 fps. I'm not saying he did but it is possible.
He understands that, he is arguing disingenuously.
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