Reading all these options gave me a headache and made me glad to have been so ignorant as to buy a pre 64 Model 70 Featherweight .308 as my first center fire rifle.
Now it seems a miracle that I was ever able to kill anything with it over the past 50 years.
Why just last weekend, shooting off hand, I shot two feral hogs in the head and one running in the shoulder (right where I aimed) with it; imagine how many I could have shot with a new whiz bang rifle in another caliber?

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CRS, NRA Benefactor Life Member, Whittington Center, TSRA, DWWC, DRSS
Android Reloading Ballistics App at http://www.xplat.net/