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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
270 WBY Mag to ?
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<blockquote data-quote="Long Time Long Ranger" data-source="post: 528697" data-attributes="member: 505"><p>The 257, 270 and 7mm wby's are all the exact same case. So you can interchange any of those with your magazine and bolt throw the same as it is now. </p><p> </p><p>It depends on what you want to do with it. For a lights out flat shooting deer rifle to 650 yards or so it is hard to beat a 257 wby shooting a 100 grain bullet 3750+ fps. My load with the 100 grain hits 3760 fps and regularly shoots groups under 2" at a quarter mile. My son shot a 2" 600 yards group last year with it getting ready for his antelope hunt. It is an off the shelf mk 5 wby rifle.</p><p> </p><p> I have shot the 270 and 7mm wby's long range for 35 years. The better bc's in 7mm are why it is a better choice. The 7mm-300 wby was extremely popular as a hunting round and 1000 yard rifle back in the 70's setting 1000 yard world records. It is 200+ fps faster than the standard 7mm wby. Remington coming out with the 8mm rem mag in 1977 making cheap brass available caused the 7mm-300 wby to lose popularity. Necking the 8mm remington gave the same ballistics with cheap brass. After that wildcat became extremely popular for about 20 years Layne Simpson decided to pull his weight with his magazine and make it a standard cartridge giving it the magazine name, shooting times westerner or STW. </p><p> </p><p>I have several of the 257, 264 and 7mm STW's and they are all top shooters and way fun to shoot. The ballistics of the 264 STW are among the best in the business for long range shooting to 1000 yards or so. It can drive the 140 Berger to 3400 fps making it a super long range deer/antelope cartridge. I have one with near 1000 rounds on it and it seems to just get better with age. As newer powders become available the 264 STW just keeps getting better and is one of my all time favorites since before anyone ever heard the wildcat called an stw. </p><p> </p><p>If I had to pick a super long range deer/antelope cartridge it would be the 264 STW because a brake is not needed for pushing the little 140's where it is needed in 7mm pushing high bc bullets. The 6.5 STW with 140 grainers will ballistically outshoot the 7mm STW with 168 grainers.</p><p> </p><p>If I had to pick a long range elk rifle it would be the 338-378 wby. It basically just blows away the competition in a hunting weight rifle and makes hits at long range far easier than with the little stuff off the RUM and Lapua cases. You can use the strong Lapua brass and push it hard to try and get close to the 338-378 wby with an improved Lapua or just shoot faster safely and easily with the 338-378 wby.</p><p> </p><p>So, there are my two rifles for long range hunting weight rifles and I own or have built or shot at my range about everything talked about on this forum with hands on experience.</p></blockquote><p></p>
[QUOTE="Long Time Long Ranger, post: 528697, member: 505"] The 257, 270 and 7mm wby's are all the exact same case. So you can interchange any of those with your magazine and bolt throw the same as it is now. It depends on what you want to do with it. For a lights out flat shooting deer rifle to 650 yards or so it is hard to beat a 257 wby shooting a 100 grain bullet 3750+ fps. My load with the 100 grain hits 3760 fps and regularly shoots groups under 2" at a quarter mile. My son shot a 2" 600 yards group last year with it getting ready for his antelope hunt. It is an off the shelf mk 5 wby rifle. I have shot the 270 and 7mm wby's long range for 35 years. The better bc's in 7mm are why it is a better choice. The 7mm-300 wby was extremely popular as a hunting round and 1000 yard rifle back in the 70's setting 1000 yard world records. It is 200+ fps faster than the standard 7mm wby. Remington coming out with the 8mm rem mag in 1977 making cheap brass available caused the 7mm-300 wby to lose popularity. Necking the 8mm remington gave the same ballistics with cheap brass. After that wildcat became extremely popular for about 20 years Layne Simpson decided to pull his weight with his magazine and make it a standard cartridge giving it the magazine name, shooting times westerner or STW. I have several of the 257, 264 and 7mm STW's and they are all top shooters and way fun to shoot. The ballistics of the 264 STW are among the best in the business for long range shooting to 1000 yards or so. It can drive the 140 Berger to 3400 fps making it a super long range deer/antelope cartridge. I have one with near 1000 rounds on it and it seems to just get better with age. As newer powders become available the 264 STW just keeps getting better and is one of my all time favorites since before anyone ever heard the wildcat called an stw. If I had to pick a super long range deer/antelope cartridge it would be the 264 STW because a brake is not needed for pushing the little 140's where it is needed in 7mm pushing high bc bullets. The 6.5 STW with 140 grainers will ballistically outshoot the 7mm STW with 168 grainers. If I had to pick a long range elk rifle it would be the 338-378 wby. It basically just blows away the competition in a hunting weight rifle and makes hits at long range far easier than with the little stuff off the RUM and Lapua cases. You can use the strong Lapua brass and push it hard to try and get close to the 338-378 wby with an improved Lapua or just shoot faster safely and easily with the 338-378 wby. So, there are my two rifles for long range hunting weight rifles and I own or have built or shot at my range about everything talked about on this forum with hands on experience. [/QUOTE]
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