I agree it is shot placement & If you shoot a lot & have good equipment it can be done with a .22 but a lot of hunters don't put the time in that they should I know a lot of people who pull their bows & rifles out a week before the season & start shooting
they will be a couple inches off & say good enough & they are benching the rifle & I am assuming at 427 yards you are not free handing the rifle here in the northeast you have only a couple seconds a lot of times & shots are usually freehand no shooting sticks & thick woods so I guess maybe out west it could be ok but I can say I would not want a .223 here in NH
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