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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
338 edge, 300 rum, 7 rum
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<blockquote data-quote="Long Time Long Ranger" data-source="post: 602951" data-attributes="member: 505"><p>Well, I just saw this and started to say about the same thing autorotate did. I am glad I read it first.</p><p> </p><p>I will add a little though to the first thing you said which struck me and obviously comes from a lot of internet hype and not actual performance. The 338 Edge you called it, goes by a ton of names of which 338-300 RUM is correct, does not blow everything away. In fact it doesn't blow anything away. It is actually on the low end of the big 338's and is an introductory cartridge for guys just getting into long range and wanting to do it on a budget since it will fit on a standard magnum action and can be done easily and cheaply. That is why I spent so much time developing the cartridge out of my shop in 1998 when we got the specs on the 300 RUM to be released soon. It beat the 340 wby by about 125 fps on a standard magnum action which was impressive in 1998. I quit doing the cartridge in 2001 with the introduction of the 338 RUM which does the same thing in a factory cartridge.</p><p> </p><p>Now, with all that said it doesn't mean that it is not a good cartridge because it is excellent and I still use the 338 RUM on occasion. Both the 338-300 and 338 RUM's are excellent in 27" length barrels because being on the low end of big 338's it doesn't burn as much powder and will work well with faster powders like H-1000 where the big 338's are better with super slow burners and barrel length. You actually will gain very little with a longer barrel, maybe 15-20 fps per inch. Not worth it because if you want a long barrel and more performance then get it in a cartridge that will blow the RUM's away. The 338-300 and 338 RUM's actually use the same accuracy loads of 91-93 grains of the old lot H-1000 with the 300 grain bullet. </p><p> </p><p>Every year new products come out that add performance within the best capable range of various cartridges. I use my RUM's and lapuas to 1000 yard shooting because if I am shooting further I use a big 338 for better performance. Within that 1000 yard range these 338's have better performance with some of the new lighter high bc bullets. They provide the same moa in windage but shoot much flatter with far less recoil in light 1000 yard rifles like you are looking at building. A 300 grainer out of a 26" barrel will knock the living crap out of you even with a brake. With 27" barrel velocities compare the 300 grainer at 2750 fps vs say a 225 grain cutting edge bullet .64 bc at 3200 fps to 1000 yards. These are my actual velocities with my personal rifles in 26". Like autorotate said, shoot equipment designed to perform best overall considering all parameters at the range you primarily intend to shoot.</p><p> </p><p>But like Autorotate said what you need to do is evaluate all the parameters of exactly what you want to do considering expense of all the support equipment to go serious long range. If you want to go serious long range then get a cartridge designed for the purpose. If you want to stay within the limitations of most affordable rangefinders and need a 1000 yard rifle then there are several like either of the 338 RUM's that will do a good job for you. I would suggest at least a 30 caliber or larger. To get good with it means quite a bit of shooting so I would recomend a 338 caliber for better barrel life and the 338 Lapua's and RUM's are excellent on barrels for the performance you get. You can go to the Lazzeroni, 338-378 wby, Excalibur, etc and get more performance within that range at the expense of dollars and barrel wear. Big 338's I know pretty well having worked quite a bit with most common cases out there since before or shortly after they were released. Necking the 378 wby case I was about ten years late on because I was a kid and couldn't afford an action to build it on.</p></blockquote><p></p>
[QUOTE="Long Time Long Ranger, post: 602951, member: 505"] Well, I just saw this and started to say about the same thing autorotate did. I am glad I read it first. I will add a little though to the first thing you said which struck me and obviously comes from a lot of internet hype and not actual performance. The 338 Edge you called it, goes by a ton of names of which 338-300 RUM is correct, does not blow everything away. In fact it doesn't blow anything away. It is actually on the low end of the big 338's and is an introductory cartridge for guys just getting into long range and wanting to do it on a budget since it will fit on a standard magnum action and can be done easily and cheaply. That is why I spent so much time developing the cartridge out of my shop in 1998 when we got the specs on the 300 RUM to be released soon. It beat the 340 wby by about 125 fps on a standard magnum action which was impressive in 1998. I quit doing the cartridge in 2001 with the introduction of the 338 RUM which does the same thing in a factory cartridge. Now, with all that said it doesn't mean that it is not a good cartridge because it is excellent and I still use the 338 RUM on occasion. Both the 338-300 and 338 RUM's are excellent in 27" length barrels because being on the low end of big 338's it doesn't burn as much powder and will work well with faster powders like H-1000 where the big 338's are better with super slow burners and barrel length. You actually will gain very little with a longer barrel, maybe 15-20 fps per inch. Not worth it because if you want a long barrel and more performance then get it in a cartridge that will blow the RUM's away. The 338-300 and 338 RUM's actually use the same accuracy loads of 91-93 grains of the old lot H-1000 with the 300 grain bullet. Every year new products come out that add performance within the best capable range of various cartridges. I use my RUM's and lapuas to 1000 yard shooting because if I am shooting further I use a big 338 for better performance. Within that 1000 yard range these 338's have better performance with some of the new lighter high bc bullets. They provide the same moa in windage but shoot much flatter with far less recoil in light 1000 yard rifles like you are looking at building. A 300 grainer out of a 26" barrel will knock the living crap out of you even with a brake. With 27" barrel velocities compare the 300 grainer at 2750 fps vs say a 225 grain cutting edge bullet .64 bc at 3200 fps to 1000 yards. These are my actual velocities with my personal rifles in 26". Like autorotate said, shoot equipment designed to perform best overall considering all parameters at the range you primarily intend to shoot. But like Autorotate said what you need to do is evaluate all the parameters of exactly what you want to do considering expense of all the support equipment to go serious long range. If you want to go serious long range then get a cartridge designed for the purpose. If you want to stay within the limitations of most affordable rangefinders and need a 1000 yard rifle then there are several like either of the 338 RUM's that will do a good job for you. I would suggest at least a 30 caliber or larger. To get good with it means quite a bit of shooting so I would recomend a 338 caliber for better barrel life and the 338 Lapua's and RUM's are excellent on barrels for the performance you get. You can go to the Lazzeroni, 338-378 wby, Excalibur, etc and get more performance within that range at the expense of dollars and barrel wear. Big 338's I know pretty well having worked quite a bit with most common cases out there since before or shortly after they were released. Necking the 378 wby case I was about ten years late on because I was a kid and couldn't afford an action to build it on. [/QUOTE]
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