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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
New .338 lanches a 300gr Sierra MK at 3500fps?
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<blockquote data-quote="Darryl Cassel" data-source="post: 21903" data-attributes="member: 34"><p>Hello Brent</p><p></p><p>The 338/416 Rigby Imp will turn up 3310 FPS if I don't care about loading the brass more then 2X and that's with a 37" barrel.</p><p>I have more case capacity but, not the powder available to use it. That could be a major problem in larger cases too.</p><p></p><p>I think the 3400FPS is VERY feasable as I saw a freind of mine take his 338/416 IMP to 3350 FPS without any pressure signs but, he had a 40" barrel. </p><p></p><p>So you see, you may not have to go too much bigger in case size to reach that 3400 FPS mark. I'm quite sure a slower burning powder and a 40" barrel will do it with the case I sent you witch has at least 8.5 to 10 grains more capacity then the 338/378 Weatherby case. </p><p></p><p>What action would you put this case or larger one on????</p><p></p><p>I have the Hall "G" on mine and it works fine. The BAT would be a fine one as would the Rock McMillen action.</p><p></p><p>I'm sure it can be done (3400 to 3450FPS) but, is it really needed? That 300 gr bullet floats so flat and accurate at just 3200 FPS it scares you. It's like it don't want to come down. Check out the ballistics on it at that speed and then go to 3310 fps.</p><p>The BC seems to run out at .797 as far as actual fire from the drop charts.</p><p></p><p>You can always get more speed with longer barrels and bigger cases, to a point.</p><p></p><p>Keep us informed as to your progress.</p><p> </p><p>Darryl</p></blockquote><p></p>
[QUOTE="Darryl Cassel, post: 21903, member: 34"] Hello Brent The 338/416 Rigby Imp will turn up 3310 FPS if I don't care about loading the brass more then 2X and that's with a 37" barrel. I have more case capacity but, not the powder available to use it. That could be a major problem in larger cases too. I think the 3400FPS is VERY feasable as I saw a freind of mine take his 338/416 IMP to 3350 FPS without any pressure signs but, he had a 40" barrel. So you see, you may not have to go too much bigger in case size to reach that 3400 FPS mark. I'm quite sure a slower burning powder and a 40" barrel will do it with the case I sent you witch has at least 8.5 to 10 grains more capacity then the 338/378 Weatherby case. What action would you put this case or larger one on???? I have the Hall "G" on mine and it works fine. The BAT would be a fine one as would the Rock McMillen action. I'm sure it can be done (3400 to 3450FPS) but, is it really needed? That 300 gr bullet floats so flat and accurate at just 3200 FPS it scares you. It's like it don't want to come down. Check out the ballistics on it at that speed and then go to 3310 fps. The BC seems to run out at .797 as far as actual fire from the drop charts. You can always get more speed with longer barrels and bigger cases, to a point. Keep us informed as to your progress. Darryl [/QUOTE]
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New .338 lanches a 300gr Sierra MK at 3500fps?
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