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Is the 300 wsm case somewhat magical?

 
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  #1  
Old 02-09-2009, 11:41 AM
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Is the 300 wsm case somewhat magical?

There seems to be a rash of people talking about this case lately. Maybe it's the intro of RE17 that has the talk going hard.
Anyhow there seems to be those that think the shape of the case is what makes it "seemingly" equal the bigger 300 win mag in velocity. It's been my contention that the wsm case is probably tougher and is getting loaded to higher pressure.
Have any of you guys got input on the subject....do you think short and fat==faster all things equal.
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Old 02-09-2009, 12:20 PM
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Re: Is the 300 wsm case somewhat magical?

I think there are a few things that people admire about the 300 wsm case.

Norma brass is available and this is one reason people do the 7mm 300 wsm.

I have read but don't know if it is true or not that a short fatter case burns powder in a more uniform fashion compared to a longer case.
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Old 02-09-2009, 04:26 PM
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Re: Is the 300 wsm case somewhat magical?

Only the ones sprinkled with Pixie Dust are magical and I happen to have some for sale!

I do buy into some of the case design advantages of the WSM type design. Keep in mind that the reloading manuals do adhere to the SAMMI pressure limits when publishing the manuals as do the ammo manufacturers when making ammo. So if you are following the manual maxs on average the WSM will certainly outperform a longer narrower case design with a lower SAMMI pressure rating. However if you are going by stickey bolt lift, flattened primers, etc the performance will run much closer. I think a big part of the equation is your rifle and what the OAL of the cartridge is in your rifle.

Some rifles chambered in short mag will not allow the bullets to be set out very far due the magazine and action length. This can hold back the rounds performance with some longer bullets. I would say if you go with the WSM make sure you have adaquate length in your rifle to avoid loosing case capacity due to the bullets seating depth. I like to have the base of the bullet seated just at or below the end of the case neck depending on how long the boat tail is. This of course also applys to standard length magnums.
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Old 02-09-2009, 05:25 PM
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Re: Is the 300 wsm case somewhat magical?

Well you need not look any farther to qualify the perfection of the case because I chose it... therefore it must be the best lol! just kidding.

I don't think the WSM will out preform the WM in any bullet weight. However, it will be very comparable to the wm with 180 gr bullets and lighter. Seating the bullets deep into the case with heavy bullets will diminish it's performance.

And for some reason the 300WSM has exceptional barrel life compared to the WM. Its kinda like the 50 year old arguement between the venerable 30-06 and the 308 win. The win is just a more efficient case, but the 06 will push a little harder.
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  #5  
Old 02-09-2009, 06:11 PM
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Re: Is the 300 wsm case somewhat magical?

I seriously think that all the hype put out by Winchester and gun writers has definately had an effect on the brainwashing of modern rifleman.
Has the 300WinMag been replaced on the 1000yrd line by the 300WSM, I think not, not where I shoot anyway.
If the hype regarding a shorter, fatter case being more accurate than a belted case, then why does the 300WinMag give bench rest like groups in a well tuned rifle?
If it was so inaccurate that it had to be replaced by another, why hasn't the replacement shown up in the record books?
The 300WSM, even overloaded, will not match the velocity of my 300WinMag with 200gr bullets, nor the accuracy and trajectory.
I can, and do get just under 3100fps with Nosler 200gr Accubonds, do that with your 300WSM!
It may well be that the 300WSM burns powder more efficiently, but cubic inches is where you get velocity from, not efficiency. The 222 Remington is a very efficient cartridge, but no matter how efficient it is, it will never match the 223 for speed, even though accuracy is often better in the 222, but neither will match the 22-250 for speed, and the accuracy in a tuned rifle is often matched with the 222Rem.
HYPE just makes you feel all warm and fuzzy on the inside, until you get into the real world and discover it to be just that, HYPE!

As for 'magical', what exactly is 'magical' about the 300WSM?
Cheers.
MagnumManiac.
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Old 02-09-2009, 09:21 PM
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Re: Is the 300 wsm case somewhat magical?

Not sure I buy into the whole cubic inches + velocity thing. If you could build a case 1 extruded powder kernel wide and 100 miles long it would certainly have more cubic inches, but efficiency would suck. It would take a hell of a throat to chamber that round! The WSM gains its "step up" from the short, wide powder column. However, the steep neck keeps it out of the "dangerous game category d/t chambering issues. Both are excellent rifles.

300 WM norma brass = 147$/100 (out of stock) and 300 WSM Norma brass = 121$/100 (in stock).
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  #7  
Old 02-09-2009, 10:24 PM
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Re: Is the 300 wsm case somewhat magical?

Quote:
Quote:
Originally Posted by MagnumManiac View Post
I seriously think that all the hype put out by Winchester and gun writers has definately had an effect on the brainwashing of modern rifleman.
Has the 300WinMag been replaced on the 1000yrd line by the 300WSM, I think not, not where I shoot anyway.
If the hype regarding a shorter, fatter case being more accurate than a belted case, then why does the 300WinMag give bench rest like groups in a well tuned rifle?
If it was so inaccurate that it had to be replaced by another, why hasn't the replacement shown up in the record books?
The 300WSM, even overloaded, will not match the velocity of my 300WinMag with 200gr bullets, nor the accuracy and trajectory.
I can, and do get just under 3100fps with Nosler 200gr Accubonds, do that with your 300WSM!
It may well be that the 300WSM burns powder more efficiently, but cubic inches is where you get velocity from, not efficiency. The 222 Remington is a very efficient cartridge, but no matter how efficient it is, it will never match the 223 for speed, even though accuracy is often better in the 222, but neither will match the 22-250 for speed, and the accuracy in a tuned rifle is often matched with the 222Rem.
HYPE just makes you feel all warm and fuzzy on the inside, until you get into the real world and discover it to be just that, HYPE!

As for 'magical', what exactly is 'magical' about the 300WSM?
Cheers.
MagnumManiac.
Wow dude, 3100 fps witha 200 gr bullet out of a 300 Win??? That is great. How long is your barrel? That is 400 fps faster than what Fed advertizes in a 200 gr bullet out of a WM.
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