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Hunting
Long Range Hunting & Shooting
6.5-300 ultra is ready!!!
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<blockquote data-quote="Long Time Long Ranger" data-source="post: 690324" data-attributes="member: 505"><p>Thanks for the update. I was following this to see the difference between this and my 264 STW. Quite a few years back we necked the 30-378 wby to 7mm and did not get a velocity gain as we expected because it was just maxed out overbore and wouldn't push the bullets any faster than smaller cartridges with the powders available at the time. </p><p> </p><p>Retumbo has been the best powder for my 264 STW. 82 grains sends the 130 CE at 3684 fps and 82.8 grains sends the 129 SST at 3709 fps. Those are my accuracy loads. Continue to let us know how this one does. I don't know how much my data will help you but I will share what I know. I think you are on the right track with the slowest powders and I think Retumbo should work well for you. What you really need is some of my old lot H-870. That would get her smoking. I haven't tried 869 but I thought it might work if it wasn't so erratic.</p></blockquote><p></p>
[QUOTE="Long Time Long Ranger, post: 690324, member: 505"] Thanks for the update. I was following this to see the difference between this and my 264 STW. Quite a few years back we necked the 30-378 wby to 7mm and did not get a velocity gain as we expected because it was just maxed out overbore and wouldn't push the bullets any faster than smaller cartridges with the powders available at the time. Retumbo has been the best powder for my 264 STW. 82 grains sends the 130 CE at 3684 fps and 82.8 grains sends the 129 SST at 3709 fps. Those are my accuracy loads. Continue to let us know how this one does. I don't know how much my data will help you but I will share what I know. I think you are on the right track with the slowest powders and I think Retumbo should work well for you. What you really need is some of my old lot H-870. That would get her smoking. I haven't tried 869 but I thought it might work if it wasn't so erratic. [/QUOTE]
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6.5-300 ultra is ready!!!
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