In my experience, most bonded .223/5.56 55-62 grain bullets are flat based rather than boat tailed. This allows for a slightly shorter bullet which is easier to stablize. I dont think you would have any troubles inside 200 yards.
Just keep in mind that with those weights, I would only use a bonded JSP bullet for hunting. Even standard soft points in these weights may not provide adequate penetration on medium game.
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