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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Badlands Precision Bullets thread - From BC to terminal ballistics
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<blockquote data-quote="Northkill" data-source="post: 2536775" data-attributes="member: 110890"><p>Did a gel test on the 7mm 150 BD-2 at hyper velocity. As you can see, the bullet pretty much came apart at the front at these speeds. It began to open up at about 2". Small pieces splintered off pretty much the whole way through the wound channel with one squirting out the bottom of the block at about 5". The tip was in the block about 4". This is consistent with what Jason told me he thought it would do at those speeds. And it also explains why the one deer that was hit in the heart broadside at 300 yds last year had a hole coming out the front brisket and also a hole in the stomach. Pieces fly off in all directions. Also, the first photo of impact shows the expansion of the wound cavity. As you see, the first 16" (first block) is the most, but it continues pretty much the whole way through the second block. Translating that to an animal, a large deer might have a chest width of about 10" behind the shoulders. That is not nearly enough cavity to absorb this much cavitation, which explains why both deer we shot last year had both shoulders dislocated even though the impacts were broadside through the heart/lung area. Penetration on this test was 36". I think it would have been more if it hadn't curved down into the table – traveled through the end grain of the plywood table a little before bouncing back up into the last block about 4"… George told me they have fellas doing Texas heart shots on moose and elk with the bullet coming out the front end. I can believe that based on what we were seeing. Get the speed down a little, the bullet would stay together more.</p><p></p><p>We left the plastic wrapping lay under the blocks, which was a mistake. Kind of made a mess flying in the air when the 1st block when flipping off. So here goes:</p><p></p><p>7 Allen Mag (338 Lapua Improved case necked down to 7mm)</p><p>106 gr RL33 powder</p><p>150 gr solid copper Badlands Bulldozer-2 (G7 0.309)</p><p>3,700 fps @ muzzle</p><p>Gel blocks at 25 yds</p><p>Penetration: 36"</p><p></p><p>* Shot a 139 Scenar from our 6.5x284 into the other end of the last gel block then. Perfect performance but 14" penetration vs 36". <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p><p></p><p>(We want to do a rerun sometime and see if we can get it better. Haven't gotten the vid edited down to size yet.)</p></blockquote><p></p>
[QUOTE="Northkill, post: 2536775, member: 110890"] Did a gel test on the 7mm 150 BD-2 at hyper velocity. As you can see, the bullet pretty much came apart at the front at these speeds. It began to open up at about 2”. Small pieces splintered off pretty much the whole way through the wound channel with one squirting out the bottom of the block at about 5”. The tip was in the block about 4”. This is consistent with what Jason told me he thought it would do at those speeds. And it also explains why the one deer that was hit in the heart broadside at 300 yds last year had a hole coming out the front brisket and also a hole in the stomach. Pieces fly off in all directions. Also, the first photo of impact shows the expansion of the wound cavity. As you see, the first 16” (first block) is the most, but it continues pretty much the whole way through the second block. Translating that to an animal, a large deer might have a chest width of about 10” behind the shoulders. That is not nearly enough cavity to absorb this much cavitation, which explains why both deer we shot last year had both shoulders dislocated even though the impacts were broadside through the heart/lung area. Penetration on this test was 36”. I think it would have been more if it hadn’t curved down into the table – traveled through the end grain of the plywood table a little before bouncing back up into the last block about 4”… George told me they have fellas doing Texas heart shots on moose and elk with the bullet coming out the front end. I can believe that based on what we were seeing. Get the speed down a little, the bullet would stay together more. We left the plastic wrapping lay under the blocks, which was a mistake. Kind of made a mess flying in the air when the 1st block when flipping off. So here goes: 7 Allen Mag (338 Lapua Improved case necked down to 7mm) 106 gr RL33 powder 150 gr solid copper Badlands Bulldozer-2 (G7 0.309) 3,700 fps @ muzzle Gel blocks at 25 yds Penetration: 36” * Shot a 139 Scenar from our 6.5x284 into the other end of the last gel block then. Perfect performance but 14" penetration vs 36". :) (We want to do a rerun sometime and see if we can get it better. Haven't gotten the vid edited down to size yet.) [/QUOTE]
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Badlands Precision Bullets thread - From BC to terminal ballistics
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