FEENIX
I meant no disrespect to you in my post. I'm simply trying to expand the conversation to what might actually be a good loosely held benchmark for most hunters. I can with 223 place with good precision first round hits at 400yards and even 600yards with 75gr bullets. The US Army says max effective range for 5.56 NATO is in the 600yard range. Using 500ftlb would but my max range for 223 at around 300yds with the 55gr bullets I hunt with. If the OP is very proficient with his chosen weapon system I don't think 300yds is out of the question. Conversations about what we each have chosen as our max effective range always seam to get a little heated. I was simply trying to give the OP more information to base his personnel decision of max range on. What might actually be a better benchmark is at what vilosity your chosen bullet reliably opens to cause max hydrolic shock to the surrounding tissue. I sometimes wish bullet manufactures would list this speed as normal info with BC and SD ect..
I never took it that way but you're missing "MY" point, there's a reason I made them bold because it is "MY" self-imposed rule in harvesting game humanely. How others choose to harvest theirs is entirely up to them. I never told the OP to do as I do. Unlike you, I never told the OP which one is a better benchmark.
I am fully aware of 5.56 round and what the military tells us. I spent 20+ year in the military and that is what they arm us. You bet your arse I will take a 600+ yard to kill an enemy.