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Long Range Hunting & Shooting
338 Allen Xpress, RL33 load development
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<blockquote data-quote="MT4XFore" data-source="post: 862637" data-attributes="member: 4945"><p>I went out yesterday to test my AX as well. The first load I tested was with the 300 Berger OTM. I used 106gr. of RL33 as that load showed 3006fps out at Kirbys. Now my AX has a 27" barrel and a standard chamber. My first shot yesterday clocked at 3040fps. Difference is his velocity and mine probably due to different chronys. Temp yesterday was 47*. I shot a five shot group, but when I went to retrieve the info to put down in my log book, I accidentally hit the "forget" button rather than the "fv" button. I am such a dummy sometimes!! I think I remember a 3017 and a 3063 as well, but I'm not sure. What I am sure about is the 200yd. group it shot. Four of the shots had two touching and two right beside them inside 3/4". The "flier" opened up the group to 1". No signs of pressure whatsoever!</p><p></p><p>Next I shot 5 shots with the 250gr. Berger OTM and 114.5gr. of RL33 using Lapau brass.. I made sure NOT to press the forget button this time and my results were: </p><p>Av Vel = 3342</p><p>Hi Vel = 3363</p><p>Lo Vel = 3331</p><p>es = 31.47</p><p>sd = 12.20 </p><p>No pressure signs here either. Primers still nice and rounded with no sharp protrusions and easy extraction.</p><p></p><p>Next I shot 5 more shots with the 250, this time using HSM(Bertram) brass and the same powder charge:</p><p>Av. Vel = 3346</p><p>Hi Vel = 3365</p><p>Lo Vel = 3331</p><p>es = 34.26</p><p>sd = 12.44</p><p>As you can see, they were almost identical. However where the difference showed up was in the pressure signs. The HSM brass had flattened primers and were extremely hard to extract. I didn't need a mallet to open the bolt, but the heel of my hand was sore. LOL A perfect example of the quality of Lapua brass, as if ya already didn't know.</p><p></p><p>The groups with these two loads were not good. It's obvious to me that I am going to need to seat to the lands and reduce my loads a bit. So, more testing to come. I will tell y'all more as it happens.</p><p></p><p>Jim</p></blockquote><p></p>
[QUOTE="MT4XFore, post: 862637, member: 4945"] I went out yesterday to test my AX as well. The first load I tested was with the 300 Berger OTM. I used 106gr. of RL33 as that load showed 3006fps out at Kirbys. Now my AX has a 27" barrel and a standard chamber. My first shot yesterday clocked at 3040fps. Difference is his velocity and mine probably due to different chronys. Temp yesterday was 47*. I shot a five shot group, but when I went to retrieve the info to put down in my log book, I accidentally hit the "forget" button rather than the "fv" button. I am such a dummy sometimes!! I think I remember a 3017 and a 3063 as well, but I'm not sure. What I am sure about is the 200yd. group it shot. Four of the shots had two touching and two right beside them inside 3/4". The "flier" opened up the group to 1". No signs of pressure whatsoever! Next I shot 5 shots with the 250gr. Berger OTM and 114.5gr. of RL33 using Lapau brass.. I made sure NOT to press the forget button this time and my results were: Av Vel = 3342 Hi Vel = 3363 Lo Vel = 3331 es = 31.47 sd = 12.20 No pressure signs here either. Primers still nice and rounded with no sharp protrusions and easy extraction. Next I shot 5 more shots with the 250, this time using HSM(Bertram) brass and the same powder charge: Av. Vel = 3346 Hi Vel = 3365 Lo Vel = 3331 es = 34.26 sd = 12.44 As you can see, they were almost identical. However where the difference showed up was in the pressure signs. The HSM brass had flattened primers and were extremely hard to extract. I didn't need a mallet to open the bolt, but the heel of my hand was sore. LOL A perfect example of the quality of Lapua brass, as if ya already didn't know. The groups with these two loads were not good. It's obvious to me that I am going to need to seat to the lands and reduce my loads a bit. So, more testing to come. I will tell y'all more as it happens. Jim [/QUOTE]
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338 Allen Xpress, RL33 load development
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