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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Henson Aluminum tipped bullets test
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<blockquote data-quote="Fiftydriver" data-source="post: 220792" data-attributes="member: 10"><p>I am not sure what jackets I had in the prototype Wildcat bullets I tested. If Richard told me, and he probably did, I have forgotten it. I know they were not J-4 and I know they were not Sierra or Sauter.</p><p> </p><p>For some reason I am thinking that he made some on some old Hornady 358 cal jackets that he reduced and then tipped but if I remember correctly those were the 250 gr AT RBBTs.</p><p> </p><p>I do know that the jackets on the prototype bullets I tested for accuracy, ballistic performance and in game in the field had a VERY heavy jacket that tapered at the nose. We were in fact worried there would not be enough expansion but with the huge AL tip in these bullets and the much more aggressive ogive, we also worried about them blowing up.</p><p> </p><p>Accuracy for the 265 gr AT RBBTs was great, as good as any of the test rifles had shot to that point so at least as good as the SMK. I tested these bullets for BC figured from bullet drop at two different velocity ranges, 2975 fps muzzle velocity(338 AX) and 3450 fps muzzle velocity(338 AM).</p><p> </p><p>Out of the 338 AX, the slower of the two, the bullet drop was measured from the muzzle and measurements were figured at 300, 500, 700 and 1000 yards. From these bullet drop figures, the BC came out to 0.970 to get the predicted drop chart to match up with actual drop numbers using known muzzle velocity and envior. specs.</p><p> </p><p>In the much faster 338 AM, I measured drop at 500, 1000, 1500, 2000 and even 3000 yards.</p><p> </p><p>For the 338 AM, for ranges under 1000 yards the BC from bullet drop came in at around 0.91, significantly lower then the much slower 338 AX over for some reason I have not totally figured out yet.</p><p> </p><p>At longer ranges, A BC of 0.89 was needed to get the bullets actual trajectory to match up to Exbal predictions. Why? Not sure but I believe it has something to do with spinning the bullet faster then it needed to be, WAY Faster!!!</p><p> </p><p>I have not tested but my theory is that had I used a 1-11 twist the BC would have been higher in the big 338 AM.</p><p> </p><p>As far as penetration, I did not get as scientific as GG. I just shot them into some milk jugs at long range and expansion was dramatic. I never recovered a fired AT RBBT but they broke the same number of water filled milk jugs as the 300 gr SMK on average so I figured they would work.</p><p> </p><p>In the 338 AX, I was afraid they would pencil with no expansion at longer ranges, in the 338 AM I was afraid they would explose at close ranges. So for testing, things worked out pretty well.</p><p> </p><p>First test was the 338 AX, muzzle velocity of 2950 fps. On a clean broadside shot on a 1100 lb bull elk at 607 yards, the bullet fully penetrated and left a 2" exit wound on the off side after hitting only rib on both sides. Bull fell before I could get another shot into him.</p><p> </p><p>On the 338 AM, planted a 265 gr AT RBBT on the hind quarter of a bedded down pronghorn at 1300 yards. He was quatering away from us at nearly a 45 degree angle, thats why the impact was so far back. The bullet penetrated up and exited just hehind the offside shoulder. Exit wound was pretty large, around 5-6", obvious expanions.</p><p> </p><p>Both penetrated VERY straight through the target, both penetrated at least 20".</p><p> </p><p>Other then that, do not have much more to offer. I will not say they expanded any more rapidly then the 300 gr SMK or any more consistantly because I only put two bullets on game but they did seem to be very consistant on impact as far as what they did on target.</p><p> </p><p>Moot point if Richard can not get Jackets!!! But this is what I know on the subject.</p></blockquote><p></p>
[QUOTE="Fiftydriver, post: 220792, member: 10"] I am not sure what jackets I had in the prototype Wildcat bullets I tested. If Richard told me, and he probably did, I have forgotten it. I know they were not J-4 and I know they were not Sierra or Sauter. For some reason I am thinking that he made some on some old Hornady 358 cal jackets that he reduced and then tipped but if I remember correctly those were the 250 gr AT RBBTs. I do know that the jackets on the prototype bullets I tested for accuracy, ballistic performance and in game in the field had a VERY heavy jacket that tapered at the nose. We were in fact worried there would not be enough expansion but with the huge AL tip in these bullets and the much more aggressive ogive, we also worried about them blowing up. Accuracy for the 265 gr AT RBBTs was great, as good as any of the test rifles had shot to that point so at least as good as the SMK. I tested these bullets for BC figured from bullet drop at two different velocity ranges, 2975 fps muzzle velocity(338 AX) and 3450 fps muzzle velocity(338 AM). Out of the 338 AX, the slower of the two, the bullet drop was measured from the muzzle and measurements were figured at 300, 500, 700 and 1000 yards. From these bullet drop figures, the BC came out to 0.970 to get the predicted drop chart to match up with actual drop numbers using known muzzle velocity and envior. specs. In the much faster 338 AM, I measured drop at 500, 1000, 1500, 2000 and even 3000 yards. For the 338 AM, for ranges under 1000 yards the BC from bullet drop came in at around 0.91, significantly lower then the much slower 338 AX over for some reason I have not totally figured out yet. At longer ranges, A BC of 0.89 was needed to get the bullets actual trajectory to match up to Exbal predictions. Why? Not sure but I believe it has something to do with spinning the bullet faster then it needed to be, WAY Faster!!! I have not tested but my theory is that had I used a 1-11 twist the BC would have been higher in the big 338 AM. As far as penetration, I did not get as scientific as GG. I just shot them into some milk jugs at long range and expansion was dramatic. I never recovered a fired AT RBBT but they broke the same number of water filled milk jugs as the 300 gr SMK on average so I figured they would work. In the 338 AX, I was afraid they would pencil with no expansion at longer ranges, in the 338 AM I was afraid they would explose at close ranges. So for testing, things worked out pretty well. First test was the 338 AX, muzzle velocity of 2950 fps. On a clean broadside shot on a 1100 lb bull elk at 607 yards, the bullet fully penetrated and left a 2" exit wound on the off side after hitting only rib on both sides. Bull fell before I could get another shot into him. On the 338 AM, planted a 265 gr AT RBBT on the hind quarter of a bedded down pronghorn at 1300 yards. He was quatering away from us at nearly a 45 degree angle, thats why the impact was so far back. The bullet penetrated up and exited just hehind the offside shoulder. Exit wound was pretty large, around 5-6", obvious expanions. Both penetrated VERY straight through the target, both penetrated at least 20". Other then that, do not have much more to offer. I will not say they expanded any more rapidly then the 300 gr SMK or any more consistantly because I only put two bullets on game but they did seem to be very consistant on impact as far as what they did on target. Moot point if Richard can not get Jackets!!! But this is what I know on the subject. [/QUOTE]
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