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<blockquote data-quote="MontanaRifleman" data-source="post: 268388" data-attributes="member: 11717"><p>Bigger caliber does not necessarily mean bigger/better cartridge. A 270 is a 30.06 necked down to 277 cal. The .06 case is bigger than the 308 case and holds more powder. The 270 will get you more velocity than the 308 in a higher or about equal BC bullet. It will go farther down range.</p><p> </p><p>Some have mentioned using a 308 to shoot deer at 700 yds. I wouldn't do this unless I had a long barreld (for more velocity) 308 with a really good load pushing a high BC bullet. If you look at the Fed tables in an attempt to compare apples to apples You will see the 270 pushing 130, 140 and 150 gr bullets upwards of 2000 fps @ 500 yds. You will see the 308 pushing165-180 bullets at about 1700-1800 fps @ 500 yds. This would be my cut off for a 308 because it is loosing velocity below minimum opening performance for most bullets.</p><p> </p><p>If a bullet pencil holes through an animal it creates a "temporary" wound channel. If it opens and expands, it creates a "permament" wound channel.</p><p> </p><p>A tempory wound channel is when a pointy or round nose bullet "pushes its way through flesh. Temporary wound channels close back up on themselves.</p><p> </p><p>A permament wound chanel "tears" its way through flesh and leaves a hole and lots of damage.</p><p> </p><p>IMO the 270 is worth about 150-200 yds more down range than the 308. Like I said, I dont use KE for determing killing effectiveness because it really doesn't tell you anything. What the bullet does when it hits flesh is what's inportant.</p><p> </p><p>My $.02</p></blockquote><p></p>
[QUOTE="MontanaRifleman, post: 268388, member: 11717"] Bigger caliber does not necessarily mean bigger/better cartridge. A 270 is a 30.06 necked down to 277 cal. The .06 case is bigger than the 308 case and holds more powder. The 270 will get you more velocity than the 308 in a higher or about equal BC bullet. It will go farther down range. Some have mentioned using a 308 to shoot deer at 700 yds. I wouldn't do this unless I had a long barreld (for more velocity) 308 with a really good load pushing a high BC bullet. If you look at the Fed tables in an attempt to compare apples to apples You will see the 270 pushing 130, 140 and 150 gr bullets upwards of 2000 fps @ 500 yds. You will see the 308 pushing165-180 bullets at about 1700-1800 fps @ 500 yds. This would be my cut off for a 308 because it is loosing velocity below minimum opening performance for most bullets. If a bullet pencil holes through an animal it creates a "temporary" wound channel. If it opens and expands, it creates a "permament" wound channel. A tempory wound channel is when a pointy or round nose bullet "pushes its way through flesh. Temporary wound channels close back up on themselves. A permament wound chanel "tears" its way through flesh and leaves a hole and lots of damage. IMO the 270 is worth about 150-200 yds more down range than the 308. Like I said, I dont use KE for determing killing effectiveness because it really doesn't tell you anything. What the bullet does when it hits flesh is what's inportant. My $.02 [/QUOTE]
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