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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
.277 175 Game Changer (TGK)
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<blockquote data-quote="Idaho Trecker" data-source="post: 2254533" data-attributes="member: 67706"><p>This has been a great thread to see some testing on this bullet. Thanks Yorke!</p><p>I started working with it back in May out of a 270 Sherman Shortmag. The bullet worked amazing on some Texas pigs while fireforming brass.</p><p></p><p>When the bullets initially came in I tried dropping one in a fired case and noticed none of them would freely fall through the neck. After measurements they all appeared to be over .2770". From there I measured diameters on Bergers, Hornady, Swift, Matrix, Nosler, and 135 SMK. All of the other brands other than the Sierra's were all right on .2770". The Sierra's were around .2772" (possibly bigger, I'll measure more accurately in a couple days with better equipment). I called Sierra and they said nominal diameter is .2772". Not sure why they make them slightly over diameter. To me it seems this gives up speed and builds pressure early. None the less I think this will be a great "mid" range bullet that will be very tough if you have the twist to run them. I also contacted Yorke and he came up with the same thing of the bullets being at .2772".</p><p></p><p>Now that I'm done with fireforming full power loads were needed. It didnt take much to get these to shoot well which was great. I ran these up to 2860 fps but that was max load with a slight click at the top of the bolt throw and all the other signs that max was found. The load I backed down to was 2 grains under my max and no pressure signs at all. These are coming out of a 19.5" 1:8 twist at 2750 fps. All things considered with this bullet having a huge bearing surface and that surface being "over" diameter with the short barrel I'm pretty happy with the speed I did achieve. If I get lucky there will be a cow elk on the ground with one of these in the next couple weeks and then some more on-game performance can be shared.</p><p></p><p>I'll update if I get an elk down with this rifle and hope to see more results from others.</p><p></p><p>[ATTACH]289152[/ATTACH]</p></blockquote><p></p>
[QUOTE="Idaho Trecker, post: 2254533, member: 67706"] This has been a great thread to see some testing on this bullet. Thanks Yorke! I started working with it back in May out of a 270 Sherman Shortmag. The bullet worked amazing on some Texas pigs while fireforming brass. When the bullets initially came in I tried dropping one in a fired case and noticed none of them would freely fall through the neck. After measurements they all appeared to be over .2770". From there I measured diameters on Bergers, Hornady, Swift, Matrix, Nosler, and 135 SMK. All of the other brands other than the Sierra's were all right on .2770". The Sierra's were around .2772" (possibly bigger, I'll measure more accurately in a couple days with better equipment). I called Sierra and they said nominal diameter is .2772". Not sure why they make them slightly over diameter. To me it seems this gives up speed and builds pressure early. None the less I think this will be a great "mid" range bullet that will be very tough if you have the twist to run them. I also contacted Yorke and he came up with the same thing of the bullets being at .2772". Now that I'm done with fireforming full power loads were needed. It didnt take much to get these to shoot well which was great. I ran these up to 2860 fps but that was max load with a slight click at the top of the bolt throw and all the other signs that max was found. The load I backed down to was 2 grains under my max and no pressure signs at all. These are coming out of a 19.5" 1:8 twist at 2750 fps. All things considered with this bullet having a huge bearing surface and that surface being "over" diameter with the short barrel I'm pretty happy with the speed I did achieve. If I get lucky there will be a cow elk on the ground with one of these in the next couple weeks and then some more on-game performance can be shared. I'll update if I get an elk down with this rifle and hope to see more results from others. [ATTACH]289152[/ATTACH] [/QUOTE]
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.277 175 Game Changer (TGK)
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