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300WM and 338WM Ballistic Comparison

 
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Old 07-28-2011, 06:37 PM
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300WM and 338WM Ballistic Comparison

After looking through Hornady's website, the 300 win mag with a 180 grain bullet comes out of the tube at 3100 fps with Hornady's Superformance Ammo, with it, comes 3900 ft lbs of energy. The 338 win mag, with a 225 grain bullet has a muzzle velocity of 2850 and 4200 ft lbs with the Superformance ammo. So the 338 is slightly slower, but has 300 ft lbs more energy at the muzzle.

But by the time these two bullets reach 500 yards, the 180 grain bullet is traveling at 2200 with 1900 ft lbs, and the 225 grainer is going 2000 fps with 2000 ft lbs. But heres the difference, at 500 yards, the 300 win mag only drops 34 inches, and the 338 drops 42.

So, my question is, since the 300 and 338 are pretty darn close when it comes to middle/long range ballistics, is there any reason to buy the 338? Is there some advantage it has that I am missing? The 300 will have less recoil, drop less, and according to ballistics, have only 100 ft lbs of energy less, so why not stay with the 300 win mag?

Thanks!
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Old 07-28-2011, 07:18 PM
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Re: 300WM and 338WM Ballistic Comparison

I do not know anything about factory ammo. But if you reload this is what you can do with each. 300 win mag 3200 fps with 180 grain .6 bc cutting edge bullet. 338 win mag 2925 fps with 225 grain cutting edge bullet .64 bc. Either one will kill something a long ways out there. I shot the 338 winchester in Alaska last year and carrying a 300 winchester this year. Obviously I am confident with either one. For large big game at the longer distances the 338 is a better choice with reloads.
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Old 07-28-2011, 07:24 PM
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Re: 300WM and 338WM Ballistic Comparison

Well for 500yds I would look at a 260, 6.5x47, 6.5 Creedmore, 7mm-08, 257 Roberts, 25-06, 308, 30-06, 280/AI, 270. All these calibers are more than capable to 500yds and more. Less powder, less recoil, and more affordable ammo. But... pertaining to your question, with proper hand loads both can be souped up to much better ballistics. Guess it's a matter of what you want. Both will get the job done. If I had a 338WM, I would go with the 225 and even the 250's. With the 300WM, I would go straight to the 208 a-max, or 210 something. I wouldn't even bother with anything less than 200grns. The 300WM is a serious competitor to 1000yds for game. JMHO!

By the way, I have a .308 that I plan on shooting deer to 800yds with. Just something to think about.

Tank
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Old 07-28-2011, 07:29 PM
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Re: 300WM and 338WM Ballistic Comparison

I heard from a pretty well known long range shooter that bullet weight after a thousand yards is one difference. Due to wind the heavier bullet is therefore bucking any wind better which results in better accuracy. I might not have explained this exactly so all you long range guys don't blow me up on this. But that was the point he was making because I had the exact question for him. lol. If I was not planning on shooting past 800 yards I would definitely go with the 300 mag.
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Old 07-28-2011, 10:11 PM
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Re: 300WM and 338WM Ballistic Comparison

We all have opinions and mine is that the 338wm isn't enough for the heavier run of the mill high bc bullets, it is a smaller case than the 300wm. And the thing about heavier bullets being more accurate at 1k and farther goes with same caliber heavier bullets, when you step up from .308 in diameter to .338 that's more surface area for the wind to push against. Put 190-210s in a 300wm and you will be happy.
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Old 07-28-2011, 10:36 PM
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Re: 300WM and 338WM Ballistic Comparison

Quote:
Originally Posted by Pbailey View Post
After looking through Hornady's website, the 300 win mag with a 180 grain bullet comes out of the tube at 3100 fps with Hornady's Superformance Ammo, with it, comes 3900 ft lbs of energy. The 338 win mag, with a 225 grain bullet has a muzzle velocity of 2850 and 4200 ft lbs with the Superformance ammo. So the 338 is slightly slower, but has 300 ft lbs more energy at the muzzle.

But by the time these two bullets reach 500 yards, the 180 grain bullet is traveling at 2200 with 1900 ft lbs, and the 225 grainer is going 2000 fps with 2000 ft lbs. But heres the difference, at 500 yards, the 300 win mag only drops 34 inches, and the 338 drops 42.

So, my question is, since the 300 and 338 are pretty darn close when it comes to middle/long range ballistics, is there any reason to buy the 338? Is there some advantage it has that I am missing? The 300 will have less recoil, drop less, and according to ballistics, have only 100 ft lbs of energy less, so why not stay with the 300 win mag?

Thanks!
I will give you a hot tip. The B.C. that you are most likely using for the 225 grain .338WM load is wrong. Punch in a G1 B.C. of 0.54 and see what you get.
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  #7  
Old 07-28-2011, 11:34 PM
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Re: 300WM and 338WM Ballistic Comparison

Pretty much most of my thoughts have been expressed. 1) I find no fault with either choice as a big game cartridge. 2) The good .30 caliber bullets start at 200 grains. I've seen the .30 180 Partition fail to break/penetrate shoulders on bigger game, game that was recovered due to fortuitous circumstances allowing follow up shots.
My answer to the why the .338 question given your particular parameters is a bit better terminal performance over time in my experience.
Again I find no fault with the .300's my answer could change if the parameters of the question did.
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