I won't argue that, Sylvan, but put that 600 gn arrow on his bow at 70 pounds and I know youwouldn't argue that itcan't do better than the 347 gn arrow. Especially when he's talking about some of these mud-caked, thick skinned, 300-500 poundTexas hogs.
There is no question that a heavier arrow shot from the same bow will deliver more of both ke and momentum and at any range. A heavier arrow shot from a bow set at 5 pounds more peak weight will deliver even more. Whether or not it can "do better" is a bit more complicated question.
If we stick with my original comparison for a moment and say that the 55 pound 600 grain example will deliver enough "punch" for a consitently clean pass through at hunting ranges then most certainly the 65 pound 347 grain example will pass through as well as it delivers more "punch". Now the 70 pound 600 grain arrow will obviously deliver more of both ke and momentum than either of the previous 2 examples so most certainly will result in pass throughs as well.
There will be2 differrences. 1) The 70 pound 600 grainexample caculatingto 249.6 ft/sec will follow a slightly more arched trajectory to its target than the65# 347 grain example and a slightly less arched trajectory than the 55# 600 grain example. 2)After "passing through" the animal itwill strike the ground with more "left over" energy than either of the 2 other examples.
So does it "do better"?Wellimo, it makes no differencehow far an arrow penetrates the ground after passing through an animal soif the measure is damage done to the animal thenclearly it has no advantage on that count. It does howeverfollow a slightly more arched trajectory than the 347 grain arrow so on that count it doesn't do quite as well. So given the facts you tell me.
IMO, more ke and momentum is "better" only to a point. Once you start driving arrows deeper and deeper into the ground after passing through, more energy is only wasted and that wasted energycould be used to flatten trajectory.