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Old 12-10-2011, 01:32 PM
  #46  
halfbakedi420
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Originally Posted by fritz1
You are right RR. I used Hornady to compare because Speer doesnt list a 140 for the 7mm, but does list a 145gr. boattail, so lets compare that with the .277 130gr. Speer boattail.

The 7mm Speer 145gr. has a b.c. of .502 and a muzzle velocity of 2933 loaded with 51grs. of RL19. It drops 41" at 500 yards and has 9.13ftlbs of energy per grain of bullet weight, which comes out to 1323.85 ftlbs of energy at 500 yards.

Now the 270 using a 130gr Speer boatail has a b.c. of .449 and a muzzle velocity of 3117 loaded with 64grs. of H1000. It drops 37.1 at 500 yards and has 9.6ftlbs of energy per grain of bullet weight, which comes out to 1248 ftlbs of energy at 500 yards.

This is a close comparison with like bullets. The 270 is less than 4" flatter at 500 yards but does not have the energy of the 7-08. Like you said and I said, not enough to make any difference in a hunting gun, where most hunting shots are under 300 yards. 4" isnt much, especially at 500 yards, this is less than a beer can and with a hunting rifle and in a hunting situation the average hunter cant even hit a beer can at 500 yards, so to me a 270 has no advantage what so ever over a 7-08 out to 500 yards, matter of fact it doesnt even have the energy that the 7-08 has out at that distance.
comparing two different cal's or bullet type, or weights is pointless.
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