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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
More range testing with 338 Allen Magnum XHS rifle....
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<blockquote data-quote="Black Diamond 408" data-source="post: 155585" data-attributes="member: 1563"><p>Kirby,</p><p></p><p>I did almost the same test saturday, i used four cases as i was checking to see where the top load started to show pressure signs. I also checked the TTI brass vs Jamison.</p><p> I started with 138 bmg50 ended up at 144, the brass ejected easy but just a hint of ejector marks on the TTI brass. Both TTI and Jamison extracted easy and went through the sizer die very good. Velocity ran from 3050 starting load of 138grns to 3295fps with the top load of 144.</p><p></p><p>I tried some US869, i checked my log book and seen where i used 143grns in my personal rifle so i loaded up 4 of these. Ejector marks, on the heavy side, opened easy. (Speed was only 3150fps) I pulled the bullets on the other 3 cases.</p><p></p><p>I also used some WC872, 143grns, they also worked fine, no ejector marks, speed was 3185fps. </p><p></p><p>I shot the BMG50 loads and the WC872 loads with another round only this time i used some Moly coated 300smk bullets, the speeds dropped 60fps on average across the board. I did not increase the powder charges to try and reach the same levels as plain 300smk bullets. </p><p></p><p>This customers gun has a 30" carbon barrel, i was happy to see i can get to 3300fps, but i would say this is about the top load for this barrel length.</p><p></p><p>I also am waiting for some of the 266 grn wildcat bullets, out of the 30" tube they should really fly! I think the US 869 powder is a bit faster burning than the BMG50, should work better with a lighter bullet.</p><p></p><p>I reloaded the same cases 5 times. They size and fit into the chamber with ease. I had some of the Horneber cases, they last much longer than either TTI or Jamison. I have noticed that Jamison's primer pockets are looser than TTI brass from the start, however the primers do seal fine.</p><p></p><p>I am going to do more testing tomorrow, i set up a row of milk jugs out in my bean field, 500-700yards, it should be fun! It will give me a good chance to check the click chart i made for the rifle. It has a Nightforce NXS 5.5-22x56 R2 redical...40moa base. I set the sighting at 100yd zero.</p><p></p><p>~Dave</p></blockquote><p></p>
[QUOTE="Black Diamond 408, post: 155585, member: 1563"] Kirby, I did almost the same test saturday, i used four cases as i was checking to see where the top load started to show pressure signs. I also checked the TTI brass vs Jamison. I started with 138 bmg50 ended up at 144, the brass ejected easy but just a hint of ejector marks on the TTI brass. Both TTI and Jamison extracted easy and went through the sizer die very good. Velocity ran from 3050 starting load of 138grns to 3295fps with the top load of 144. I tried some US869, i checked my log book and seen where i used 143grns in my personal rifle so i loaded up 4 of these. Ejector marks, on the heavy side, opened easy. (Speed was only 3150fps) I pulled the bullets on the other 3 cases. I also used some WC872, 143grns, they also worked fine, no ejector marks, speed was 3185fps. I shot the BMG50 loads and the WC872 loads with another round only this time i used some Moly coated 300smk bullets, the speeds dropped 60fps on average across the board. I did not increase the powder charges to try and reach the same levels as plain 300smk bullets. This customers gun has a 30" carbon barrel, i was happy to see i can get to 3300fps, but i would say this is about the top load for this barrel length. I also am waiting for some of the 266 grn wildcat bullets, out of the 30" tube they should really fly! I think the US 869 powder is a bit faster burning than the BMG50, should work better with a lighter bullet. I reloaded the same cases 5 times. They size and fit into the chamber with ease. I had some of the Horneber cases, they last much longer than either TTI or Jamison. I have noticed that Jamison's primer pockets are looser than TTI brass from the start, however the primers do seal fine. I am going to do more testing tomorrow, i set up a row of milk jugs out in my bean field, 500-700yards, it should be fun! It will give me a good chance to check the click chart i made for the rifle. It has a Nightforce NXS 5.5-22x56 R2 redical...40moa base. I set the sighting at 100yd zero. ~Dave [/QUOTE]
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More range testing with 338 Allen Magnum XHS rifle....
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