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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
338 lapua improoved shooter!!!
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<blockquote data-quote="Fiftydriver" data-source="post: 394300" data-attributes="member: 10"><p>I am getting between 2950 and 3050 fps with my 338 AX in a 30" barrel, just depending on specific barrel. I use Retumbo and it has produced the best velocity and accuracy combination hands down. </p><p> </p><p>I did try H50BMG and it did shoot very well. I could not get up to the working pressures I wanted and it was a bit dirty because of that and velocity topped out at around 2900 fps, about the same as H-1000 and RL-25 but these two pressured out a bit faster for lower load density.</p><p> </p><p>One thing that may be a factor is that I am loading my AX to an OAL of around 3.670" and that is likely why 50BMG is just to slow. Seat that bullet out to 4.000" and it changed things dramatically.</p><p> </p><p>The limited testing I have done so far with the Berger 300 gr Hybrid, it seems to be running around 50 fps faster then the SMK and I have pushed then right up to the 3100 fps level but accuracy was quite unimpressive. Best groups came in at 2875 to 2900 fps for the Berger, while the best groups with the SMK came in at 2950 to 2975 fps.</p><p> </p><p>It just goes to show you though, every rifle is different and thats why its never a bad idea to try something that would seem to go a bit against conventional wisdom.</p><p> </p><p>let us know how your accuracy testing goes, very good velocity performance.</p></blockquote><p></p>
[QUOTE="Fiftydriver, post: 394300, member: 10"] I am getting between 2950 and 3050 fps with my 338 AX in a 30" barrel, just depending on specific barrel. I use Retumbo and it has produced the best velocity and accuracy combination hands down. I did try H50BMG and it did shoot very well. I could not get up to the working pressures I wanted and it was a bit dirty because of that and velocity topped out at around 2900 fps, about the same as H-1000 and RL-25 but these two pressured out a bit faster for lower load density. One thing that may be a factor is that I am loading my AX to an OAL of around 3.670" and that is likely why 50BMG is just to slow. Seat that bullet out to 4.000" and it changed things dramatically. The limited testing I have done so far with the Berger 300 gr Hybrid, it seems to be running around 50 fps faster then the SMK and I have pushed then right up to the 3100 fps level but accuracy was quite unimpressive. Best groups came in at 2875 to 2900 fps for the Berger, while the best groups with the SMK came in at 2950 to 2975 fps. It just goes to show you though, every rifle is different and thats why its never a bad idea to try something that would seem to go a bit against conventional wisdom. let us know how your accuracy testing goes, very good velocity performance. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
338 lapua improoved shooter!!!
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