I think one of the biggest disservice's gun & ammo companies every did to the shooting public was to market the 243 as the perfect rifle for both varmints & deer. I long ago proved to myself the 243 is a great coyote round but a marginal deer round under all but perfect conditions, and I killed more than my share of both with it....
If you have to use a 243, use nothing but a premium 100 grain like a Barnes or Nosler Partition. Stay away from the Nosler Ballistic Tip for deer in the 243 as it just doesn't hold together with enough consistency.
Best option is to use that 243 for coyotes and get a 25-06, 270, 30-06, etc, for your deer hunting...
I use Serria 85 gr. HPBT game kings for all my 243 shooting. I have harvested some big UPPER Michigan deer with it in the big woods as well as the cedar swamps.
I would recommend the 243 to any body for deer hunting. It does take the right bullet though.
I personally don't think a deer is any tougher than a youte.
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