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Long Range Hunting & Shooting
338 edge load / velocity question
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<blockquote data-quote="Wedgy" data-source="post: 1329764" data-attributes="member: 64108"><p>I always like to go until I get pressure signs(flat, cratered, ejector) so I know where it is then back off, 93.5 gave me all these and the closest node ended up at 91.5, very close to you but a 30" tube 9 twist.</p><p>Your barrel may speed up a little bit usually 50ish fps after 40-80 rounds. After your brass is fireformed your speed may come up a little with the same load also. I can go near 3000fps with Reloder 33, never tried Retumbo.</p><p>You need to test this gun at long range, I mean LONG....in one ladder test a 5 grain spread over 5 shots had less than 3" of vertical at 650 yards.</p><p></p><p>300 Berger OTM</p><p>OAL – 3.920"</p><p>Brass – Bertram</p><p>Primer – CCI 250</p><p>Powder – H1000</p><p>Charge – 91.5 grains</p><p>Average Velocity – 2860 fps</p><p></p><p>Switched to non lead now</p><p>275 CEB Lazer</p><p>103.0 grains Reloder 33</p><p>CCI 250 3018 fps</p><p>0.015" off (don't remember the length off hand)</p><p></p><p>PS; I found Reloder 33 to be stable until about the mid ~84F the it starts to really gain after that, similar to Reloder 26</p></blockquote><p></p>
[QUOTE="Wedgy, post: 1329764, member: 64108"] I always like to go until I get pressure signs(flat, cratered, ejector) so I know where it is then back off, 93.5 gave me all these and the closest node ended up at 91.5, very close to you but a 30" tube 9 twist. Your barrel may speed up a little bit usually 50ish fps after 40-80 rounds. After your brass is fireformed your speed may come up a little with the same load also. I can go near 3000fps with Reloder 33, never tried Retumbo. You need to test this gun at long range, I mean LONG....in one ladder test a 5 grain spread over 5 shots had less than 3" of vertical at 650 yards. 300 Berger OTM OAL – 3.920” Brass – Bertram Primer – CCI 250 Powder – H1000 Charge – 91.5 grains Average Velocity – 2860 fps Switched to non lead now 275 CEB Lazer 103.0 grains Reloder 33 CCI 250 3018 fps 0.015" off (don't remember the length off hand) PS; I found Reloder 33 to be stable until about the mid ~84F the it starts to really gain after that, similar to Reloder 26 [/QUOTE]
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338 edge load / velocity question
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