I have killed several deer with the 30-30 LR they kill quick and easy if you do your part. I have cleaned several of these deer and the damage is awesome the first doe a shot had one lung blown into three pieces. I shot an Eight point at 100 yards and a quarter too angle inthe front shoulder and stopped at the back rib under the hide. I didn't cut the bullet out but could feel it and it felt like a perfect mushroom. I still kick myself for not getting the bullet, only one that didn't exit.
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Whatever a 7x57 can do a 270 can do better.

True fair chase is you in the woods buttnaked with nothing but your finger nails and teeth.

If you'e fixin' to put a hole in something, make it a hole to remember.