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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
338 EDGE or 338 Ultra Maxx?? please help
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<blockquote data-quote="Long Time Long Ranger" data-source="post: 307375" data-attributes="member: 505"><p>I can tell you there will not be a 125 fps difference. With a slight increase in powder capacity you should get a slight increase in velocity. I have seen 338 ultramags outshoot 338-300 ultramags just because of a fast barrel or a slow barrel. There is hardly any difference between the two and improving it 5 or so grains of powder is just not going to make that much difference. If velocity is important to someone they need to step up to the 378 or 416 imp case and get a bit more. I would get a 338 ultramag for your action. It will feed better, be cheaper to get set up for reloading, can buy over the counter shells and may be faster than the next guys 338-300 because you may get a fast barrel. In a hunting situation you are just not going to notice any difference. </p><p></p><p>Again, here are average velocities fired from many rifles in some of the popular 338's. Anyone can deduct from these that a slight powder gain from improvement is not going to make a new world beater or make that much difference in a hunting situation. All 28" barrels 250 grain bullet; 340 wby six rifles accuracy loads from 3012 fps to 3065 fps. 338 ultramag and 338-300 ultramag over a hundred rifles accuracy loads from 3058 fps to 3145 fps. 338-378 weatherby accuracy loads from 15-20 rifles from 3239 fps to 3351 fps. I can look up loads for many more rifles in my database but I think this a good representation. </p><p></p><p>These rifles loads were from 86 grains of powder to 130 grains of powder and look at the results. From a fast 340 to a slow 338-378 there is 174 fps difference. The ultramags and Lapuas and variations of them fall between these two. So there is your velocity spread with the popular 338's. There is no golden bullet. Pick one and have fun with it. When I see these claims of improving a cartridge 5-8 grains and getting huge velocity increases in 338 caliber you see why I just go to the next post. A guy could improve a cartridge and hit on one fast barrel and get glorious results but you have got to look at the averages the next guy might get.</p></blockquote><p></p>
[QUOTE="Long Time Long Ranger, post: 307375, member: 505"] I can tell you there will not be a 125 fps difference. With a slight increase in powder capacity you should get a slight increase in velocity. I have seen 338 ultramags outshoot 338-300 ultramags just because of a fast barrel or a slow barrel. There is hardly any difference between the two and improving it 5 or so grains of powder is just not going to make that much difference. If velocity is important to someone they need to step up to the 378 or 416 imp case and get a bit more. I would get a 338 ultramag for your action. It will feed better, be cheaper to get set up for reloading, can buy over the counter shells and may be faster than the next guys 338-300 because you may get a fast barrel. In a hunting situation you are just not going to notice any difference. Again, here are average velocities fired from many rifles in some of the popular 338's. Anyone can deduct from these that a slight powder gain from improvement is not going to make a new world beater or make that much difference in a hunting situation. All 28" barrels 250 grain bullet; 340 wby six rifles accuracy loads from 3012 fps to 3065 fps. 338 ultramag and 338-300 ultramag over a hundred rifles accuracy loads from 3058 fps to 3145 fps. 338-378 weatherby accuracy loads from 15-20 rifles from 3239 fps to 3351 fps. I can look up loads for many more rifles in my database but I think this a good representation. These rifles loads were from 86 grains of powder to 130 grains of powder and look at the results. From a fast 340 to a slow 338-378 there is 174 fps difference. The ultramags and Lapuas and variations of them fall between these two. So there is your velocity spread with the popular 338's. There is no golden bullet. Pick one and have fun with it. When I see these claims of improving a cartridge 5-8 grains and getting huge velocity increases in 338 caliber you see why I just go to the next post. A guy could improve a cartridge and hit on one fast barrel and get glorious results but you have got to look at the averages the next guy might get. [/QUOTE]
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338 EDGE or 338 Ultra Maxx?? please help
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