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The 2 rifle build
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<blockquote data-quote="Don A Parsons" data-source="post: 1641195" data-attributes="member: 97414"><p>Thanks Austin, and yes,,, my end goal is to really end up with 1 hunting rifle and a target unit for the off season,,, just the mid size cartridges to keep it simple...</p><p></p><p>Any-who,,, I'm into a head scratcher tonight to find out whats going on from the 5 day shoot in the East Country along the rolly hills.</p><p></p><p>So the rifle is my F Class rig in 308 Winny 10 1/4 twist at 32"...</p><p></p><p>Hornady ELD-X 178gr with MV @ 2700 using 44gr of Varget Small Primer Palma Lapua brass.</p><p>Zero at 100 meters/ yards with 76 MOA to the 1450 yards...</p><p></p><p>Here's the puzzle,,, at a 1000 meters/ close to in yards,,, the boolitz are at 1200 ft-per seconds this is where the boolitz are going threw the transition faze from sonic to sub-sonic...</p><p></p><p>The strange thing is that I was onto a 12" metal gong at 1450 yards or 1325 meters = 943 ft-per seconds to impact...</p><p></p><p>Strange thing is that I got onto it at shot 7,,, followed by 3 more misses out of 10,,, then tagged it 3 out of 10 on the next set...</p><p></p><p>Obviously the boolitz are still facing forward or they wouldn't of be able to tag the little 12" if the trajectories were going side ways as I though...</p><p></p><p>This occurred to me when I tagged the 24" gong 7 out of 10 on set 3,,, so my coach said that the boolitz might be going wonky in the transition faze,,, yet they have time to smoooooth out at this distance a """bit""" before all 4@!! Breaks loose...</p><p></p><p>Head scratcher for sure... Another thing that I'm thinking is that I had a 11 mpr tail wind pushing those little boolitz along,,, don't get me right or wrong,,, but I know for a fact that 180gr boolit out of a 308 struggle at the 880 yard mark... A 1000 yards is pushing the limit,,, yet I'm reaching out there waaaaay past its limits...</p><p></p><p>Be dammed if I can figure it out,,, the reason I went with a 10 1/4 twist was that the 175/185 boolitz are with in the yellow of optimum twist calculations at 900 meters,,, the scale of 1.52 or just above the 1.5 at the tail end of the 900 metres...</p><p></p><p>The SG is 1.37 @ 1450 yards,,, that's way bellow the 1.50,,, if you think your scratching your head,,, let me tell you I've been trying to think this threw for 2 nights now...</p><p></p><p>Something not adding up since it tough for a 308 to pull this off,,, my 30/06 Sherman loaded hot would struggle with this... Not saying I haven't pushed it's limits past that distance either...</p><p></p><p>My former 300's were the units that took me those distance years ago,,, this is part of the mix that I wanted to find out with the mid size cartridges...</p><p></p><p>How come both of these mid bores are able to reach out further then what I thought was possible...</p><p></p><p>I know one thing,,, a paper target will be standing up next time...</p><p></p><p> Holes in the paper will dedicate front end impacts, big massive tears will show signs of cross threaded and side ways...</p><p></p><p>It will be a few days before I get back to the hills,,, finding out what is not working has always been my goal,,, that way it lessons the chances of entering the Olympics. Ha...</p><p></p><p>Reporting from the North that's on Fire,,, darn dry in our parts this year,,, hard to believe that only a few months ago it was -36 to -40... LOL Global freezing and warming at both ends of the scale...</p></blockquote><p></p>
[QUOTE="Don A Parsons, post: 1641195, member: 97414"] Thanks Austin, and yes,,, my end goal is to really end up with 1 hunting rifle and a target unit for the off season,,, just the mid size cartridges to keep it simple... Any-who,,, I'm into a head scratcher tonight to find out whats going on from the 5 day shoot in the East Country along the rolly hills. So the rifle is my F Class rig in 308 Winny 10 1/4 twist at 32"... Hornady ELD-X 178gr with MV @ 2700 using 44gr of Varget Small Primer Palma Lapua brass. Zero at 100 meters/ yards with 76 MOA to the 1450 yards... Here's the puzzle,,, at a 1000 meters/ close to in yards,,, the boolitz are at 1200 ft-per seconds this is where the boolitz are going threw the transition faze from sonic to sub-sonic... The strange thing is that I was onto a 12" metal gong at 1450 yards or 1325 meters = 943 ft-per seconds to impact... Strange thing is that I got onto it at shot 7,,, followed by 3 more misses out of 10,,, then tagged it 3 out of 10 on the next set... Obviously the boolitz are still facing forward or they wouldn't of be able to tag the little 12" if the trajectories were going side ways as I though... This occurred to me when I tagged the 24" gong 7 out of 10 on set 3,,, so my coach said that the boolitz might be going wonky in the transition faze,,, yet they have time to smoooooth out at this distance a """bit""" before all 4@!! Breaks loose... Head scratcher for sure... Another thing that I'm thinking is that I had a 11 mpr tail wind pushing those little boolitz along,,, don't get me right or wrong,,, but I know for a fact that 180gr boolit out of a 308 struggle at the 880 yard mark... A 1000 yards is pushing the limit,,, yet I'm reaching out there waaaaay past its limits... Be dammed if I can figure it out,,, the reason I went with a 10 1/4 twist was that the 175/185 boolitz are with in the yellow of optimum twist calculations at 900 meters,,, the scale of 1.52 or just above the 1.5 at the tail end of the 900 metres... The SG is 1.37 @ 1450 yards,,, that's way bellow the 1.50,,, if you think your scratching your head,,, let me tell you I've been trying to think this threw for 2 nights now... Something not adding up since it tough for a 308 to pull this off,,, my 30/06 Sherman loaded hot would struggle with this... Not saying I haven't pushed it's limits past that distance either... My former 300's were the units that took me those distance years ago,,, this is part of the mix that I wanted to find out with the mid size cartridges... How come both of these mid bores are able to reach out further then what I thought was possible... I know one thing,,, a paper target will be standing up next time... Holes in the paper will dedicate front end impacts, big massive tears will show signs of cross threaded and side ways... It will be a few days before I get back to the hills,,, finding out what is not working has always been my goal,,, that way it lessons the chances of entering the Olympics. Ha... Reporting from the North that's on Fire,,, darn dry in our parts this year,,, hard to believe that only a few months ago it was -36 to -40... LOL Global freezing and warming at both ends of the scale... [/QUOTE]
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