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Reloading
Berger 155.5 fullbore ?? Help
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<blockquote data-quote="milanuk" data-source="post: 536175" data-attributes="member: 376"><p>Yep... they do work pretty well <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big Grin :D" loading="lazy" data-shortname=":D" /></p><p></p><p>I was doing load testing for a new barrel (12 BR barrel screwed on a 12 Palma action/stock) Friday/Saturday mornings... when I went to shoot a confirmation test @ 300yds yesterday morning (using a 6" shoot-n-c for an aiming point so I could see my shots in the mirage) first shot, okay, see it. Second shot... where the heck did it go. Third shot where did that one go? Fourth shot... same. ***?!? Finally pumped the fifth shot into the dirt berm beside the target to make sure they were actually making it to the target (this particular tube has a slightly faster twist than the F/TR or Palma), yep, big puff of dirt. Wrote that one off as 'weird', and continued w/ doing load testing. </p><p></p><p>At the end of the day, I wound up back down at the same charge weight and everything, and had a *very* flat group - albeit w/ the wind playing hell with the actual group size. Very tight vertical, which is what I want to see. I drove down to the targets (finally) to take a closer peek and admire the view... when I 'found' the missing shots from that first group of the day. Turns out they all were in one little hole - not 'touching', one dime-sized hole. The hole *had* looked a little big for one bullet hole @ 300 thru the scope, but four? Too bad I screwed it up by pumping that last round into the berm <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big Grin :D" loading="lazy" data-shortname=":D" /></p><p></p><p>Now if I could only do that regularly, on demand <sigh> Granted, the conditions were unusually stable and all, but it was an eye-opener!</p><p></p><p>I'm thinking load development for that particular combination is *done*, save for a cursory run over the chrono.</p><p></p><p>FWIW, this particular barrel didn't seem to like the 45 thou jump that my past tubes (4 12 F/TR, 2 12 Palma) have... after the initial testing didn't pan out very well, I went back and went from 45 to 25 to 15 to 10 to 5 thou jump, and 15 seemed to be the magic number for this barrel. This seems to be consistent with what I've heard from a number of other people - their barrel either likes them around 10-20 thou jump (15 being common) or 45+ thou jump.</p><p></p><p>Monte</p></blockquote><p></p>
[QUOTE="milanuk, post: 536175, member: 376"] Yep... they do work pretty well :D I was doing load testing for a new barrel (12 BR barrel screwed on a 12 Palma action/stock) Friday/Saturday mornings... when I went to shoot a confirmation test @ 300yds yesterday morning (using a 6" shoot-n-c for an aiming point so I could see my shots in the mirage) first shot, okay, see it. Second shot... where the heck did it go. Third shot where did that one go? Fourth shot... same. ***?!? Finally pumped the fifth shot into the dirt berm beside the target to make sure they were actually making it to the target (this particular tube has a slightly faster twist than the F/TR or Palma), yep, big puff of dirt. Wrote that one off as 'weird', and continued w/ doing load testing. At the end of the day, I wound up back down at the same charge weight and everything, and had a *very* flat group - albeit w/ the wind playing hell with the actual group size. Very tight vertical, which is what I want to see. I drove down to the targets (finally) to take a closer peek and admire the view... when I 'found' the missing shots from that first group of the day. Turns out they all were in one little hole - not 'touching', one dime-sized hole. The hole *had* looked a little big for one bullet hole @ 300 thru the scope, but four? Too bad I screwed it up by pumping that last round into the berm :D Now if I could only do that regularly, on demand <sigh> Granted, the conditions were unusually stable and all, but it was an eye-opener! I'm thinking load development for that particular combination is *done*, save for a cursory run over the chrono. FWIW, this particular barrel didn't seem to like the 45 thou jump that my past tubes (4 12 F/TR, 2 12 Palma) have... after the initial testing didn't pan out very well, I went back and went from 45 to 25 to 15 to 10 to 5 thou jump, and 15 seemed to be the magic number for this barrel. This seems to be consistent with what I've heard from a number of other people - their barrel either likes them around 10-20 thou jump (15 being common) or 45+ thou jump. Monte [/QUOTE]
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Berger 155.5 fullbore ?? Help
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