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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
150 Grain.270 Sierra Gameking on Whitetail
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<blockquote data-quote="Brad Norman" data-source="post: 2015842" data-attributes="member: 33163"><p>Good point. (Pun intended) I really see some deformation with all makes of bullets with exposed lead tips. I think that's just the way it is with lead. At the ranges I use them for hunting, at about 500 yards max, it hasn't seemed to cause any problem. The darned 150-grain Sierras are sure accurate, even with what appears to be "inconsistency" with their tips. I've used polymer-tipped Hornady and Nosler bullets for longer-range shooting (steel and paper) and with those in the 6.5-284 we've taken Elk and Pronghorn at longer distances, in the 600 to 800 yard range. I suppose that's why the 6.5's and the 7mm's are so popular for long range. There's a better bullet selection and, accordingly, gun makers twist the barrels faster.</p><p></p><p>Unfortunately it seems .277 projectiles are only made for the 1:10 twist and every rifle manufacturer follows suit, always sticking with that. So we're stuck with lower-BC .277 projectiles, almost all between 130 and 150 grains. The 160 Partition performed perfectly for me on a Bull Elk in Idaho years ago, but it's not a long-range bullet by any means. Berger now makes a 170 in their "Extreme Outer Limit" bullet and recommends a 1:9 or faster spin rate. I was hoping Sierra would follow Berger's lead with the Game Changer. It was disappointing to see they produced it only in 140-grain for the .270, which is really too bad. </p><p></p><p>In the not-too-distant future I'll re-barrel an old Remington 700 in .270, and have it twisted 1:8 or 1:8.5. Sierra tells me their 150 Game King (BTSP) will hold together and have no problem inside the barrel with the faster rate. The technician I spoke with opined they might open-up a little faster on impact . . . but he wasn't sure. I'd be curious to know what experiences others have had with a tighter twist barrel in the .270 Winchester or the .270 WSM.</p></blockquote><p></p>
[QUOTE="Brad Norman, post: 2015842, member: 33163"] Good point. (Pun intended) I really see some deformation with all makes of bullets with exposed lead tips. I think that's just the way it is with lead. At the ranges I use them for hunting, at about 500 yards max, it hasn't seemed to cause any problem. The darned 150-grain Sierras are sure accurate, even with what appears to be "inconsistency" with their tips. I've used polymer-tipped Hornady and Nosler bullets for longer-range shooting (steel and paper) and with those in the 6.5-284 we've taken Elk and Pronghorn at longer distances, in the 600 to 800 yard range. I suppose that's why the 6.5's and the 7mm's are so popular for long range. There's a better bullet selection and, accordingly, gun makers twist the barrels faster. Unfortunately it seems .277 projectiles are only made for the 1:10 twist and every rifle manufacturer follows suit, always sticking with that. So we're stuck with lower-BC .277 projectiles, almost all between 130 and 150 grains. The 160 Partition performed perfectly for me on a Bull Elk in Idaho years ago, but it's not a long-range bullet by any means. Berger now makes a 170 in their "Extreme Outer Limit" bullet and recommends a 1:9 or faster spin rate. I was hoping Sierra would follow Berger's lead with the Game Changer. It was disappointing to see they produced it only in 140-grain for the .270, which is really too bad. In the not-too-distant future I'll re-barrel an old Remington 700 in .270, and have it twisted 1:8 or 1:8.5. Sierra tells me their 150 Game King (BTSP) will hold together and have no problem inside the barrel with the faster rate. The technician I spoke with opined they might open-up a little faster on impact . . . but he wasn't sure. I'd be curious to know what experiences others have had with a tighter twist barrel in the .270 Winchester or the .270 WSM. [/QUOTE]
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150 Grain.270 Sierra Gameking on Whitetail
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