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.300 WSM vs. 7mm WSM

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Unread 01-10-2008, 06:40 PM
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71, i'm not siding with anyone on the 7 vs. 30 thing, just use whichever you like. but as far as the 180 bergers for big game, you betcha. it's one heck of a game killing machine!
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Unread 01-10-2008, 07:13 PM
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Saying BC is BS is ridiculous when you're talking about long range shooting. Yes that 30 BR might have been accurate but that round is designed for 100-200 yard bench shooting, NOT killing deer at 1000 yards. Sometimes it might be easier to make a bullet shoot that has a big round nose on it, but if you can get a bullet with a higher BC to shoot it will always perform better at long range.
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Unread 01-10-2008, 07:42 PM
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Originally Posted by arthurj View Post
but if you can get a bullet with a higher BC to shoot it will always perform better at long range.
Why did you put that "if" in there? You should define "perform", more accurate? more retained energy? handle the wind better? or are you just repeating what you have been led to believe?
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Unread 01-10-2008, 08:27 PM
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Originally Posted by eclipse71 View Post
7MM WSM is already DEAD..forget it.
She's ( 7mmWSM ) in the same league of 30TC, 300-338 RCM....
Hmmm, these cartridges are DOA???
30 TC - a short action, small bolt face cartridge capable of 30-06 performance? I would say alive and well, especially in AR10s.
RCM - Short action magnums capable of 24-26 inch barrel velocities from a 20" barrel? Hmmm, me thinks would make a great light weight rifle cartridge (short action/short barrel = much less weight). And if you can chamber AR10 in 300RSAUM, why not 300RCM and take advantage of the 20" barrel?

Time will only tell, but I will probably own one of these chamberings.
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Unread 01-10-2008, 08:38 PM
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Join Date: Jan 2008
Location: Quebec, Canada
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i forgot

I forgot to put the RSAUM in this package....
AR-10 and these family in my place are: Rectricted
Mean: not for hunting purpose, Just at the shooting club.

WSM ( 270-300 )are so popular here ( Canada )
They eclipse anything else.
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Unread 01-10-2008, 08:52 PM
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Yes I did write "if." To define perform: A bullet with a higher BC will retain more velocity, thus more energy, and buck the wind better at long range. I hope youre not about to try and convince me that this is not the truth. But... let me rephrase this, if bullet A with a BC of .4 shoots .5" at 300 yards, and bullet B with BC of .7 shoots 4" at 300 yards, yes I will take the lower BC any day. If bullet A shoots .5" at 300 yards, and bullet B shoots .75" or even 1" at 300 yards, I would take bullet B any day. I'm not trying to start anything, but the way your post was worded it sounded like you said BC makes no difference in bullet performance.

Last edited by arthurj; 01-10-2008 at 08:56 PM.
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Unread 01-10-2008, 09:43 PM
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The 30 cal versus the 7mm is always a big debate and both sides always have some sort of lop sided info.

Fact , two rilfes chambered in case of same case capacity but one has a 7mm bore and the other has a 308 bore , the 308 will shoot faster in every case with bullets of the SAME WEIGHT , its simple physics the 30 cal has a better bore to powder ratio.

Fact , bullets of the same weight and bullet desgine , one in 7mm one in 30 cal the 7mm will always have the higher BC due to the longer bullet with higher SD.
Now which one shoots flatter? the faster bullet or the higher BC? , that question depends on what range your talking about. Out to 400 maybe 500yds the faster bullet will generaly win because its going faster and the differance in BC realy hasen't become evident yet but past 500yds the fatter bullet with lower BC is going to start to slow down faster and as this happens the wide plays a bigger effect ands does the drop so the 7mm will take over in the flatter shooting department as this transition takes place the 7mm bullet is going faster and having the same weight will retain more energy.
So which one shoots flatter the 300 win mag shooting a 150gr Balistic tip at 3400fps or the 7mm rem mag shooting a 160gr Accubond at 3000fps? at 400yds the 300 but at 800yds the 7mm is kicking its butt and at 1000yds the 30 cal 150gr is mearly a varmint round where the 160gr 7mm bullet will have plenty of energy to kill deer. So which one shoots flatter?

As for the debate on the 7mmWSM versus the 300WSM , well that boils back down to the same factors we just discussed. But compairing the 300 Win mag to the 300WSM is not even fair as the 300 Win mag hold alot more powder and the 300 Win mag will out run the WSM every time if the barrel is at least 24" ,the same goes for the 7mmWSM versus the 7mm Rem mag. Yes the WSM case is more efficient than the older bigger mags but the power differance boils down to "over bore capacity" more than effeciency ,thats why their is only a small increse in velocity compaired to powder increase moving from 30-06 to 30-378 , the 30-378 is using 100% more powder yet only has a velocity increase of less than 1000 fps that around the 30% mark?

So this new rifle is to be used for Elk and ground hogs (intersting combo) , at what ranges are this critters to be shot at? both the 300WSM and the 7mm will kill elk out to 500 maybe 600yds effeciently with good bullets. What kind of paramiters do you have for this weapon , as in weight , length , range for shooting , do you reload? , how many rounds are you expencted to shoot a year?
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