ORIGINAL: James B

My numbers are from the shooting times Magazine. These numbers are furnished by Fedaeal for the artical Thay also supplied the rifle and the ammo for the hunt and the eveluation. Now I don't own a 338 Federal yet. I do however own a 308 and have the ballistics on my desk here in front of me. I can confirm these from three different Reloading manuals. Using Federals Ballistics from their own tests, the 338 Fed will fire a 210 grain bullet at 2630 fps for a ME of 3224 Lb According to Barnes and Sierra and MY CHRONOGRAPH BOOK, the 308 will fire a 200 hrain bullet at 2400-2450 fps for a ME reading of 2690 lb.

I really don't have a horse in this race but these ballistics are sound and I have them from several sources. It does not matter which 338 caliber or which 308 caliber that you fire these bullets from. Use a 338-06 and a 30-06 or a 300 Wim Mag and a 338 Win Mag, When these bullets are fired at these listed velocities, thats the results you get. I have chronographed about every bullet that you can stuff in a 308 and have fired probably 20000 rounds through them in ten years of steel silhoutte shooting. I know the ballistics of the 308. I have no reason to doubt Federal ballistic as my manuals with data for the 338-06 and a few other 338 wildcats show the same results. I seldom use factory ammo but I have always had at least one chronograph since I started reloading so I am sure of my readings.

That proves my point to me and you will go on believing whatever choose. The same thing happens when you neck the 30-06 to 338. The 30-06 fires the 200 grain bullet at 2680 fps, the 338-06 fires the 200 grain bullet at 2828 fps. Same case same shoulder angle, However when necked to 338, the average amount of powder used is about 4-5 grains more for the 338-06.