So I was finaly able to do some serious tuning with the new Covert Hunter, Hex 9w limbs, 50# @ 28".
It tunes with XX75 2219 and 125 tips (3 balde Snuffers) OR higher foc Easton Aftermaths .340 with 175 tips (2 blade Deltas). On one hand I like the extra arrow weight and momentum of those big XX75s, but part of me is drawn to the higher foc and speed of the Aftermaths. Then I have the choice of 3 blade holes vs wider 2 blade.
Another one of those archery situations where there is no BEST answer, just personal choice.
Both are tuned...
While I do believe that FOC is a good thing, a well tuned arrow trumps most everything else!!!
I agree with Chuck and Todd and bhbinder. While the results of the Ashby studies are undeniable, their application to whitetails (and squirrels) is debatable.
I shot high FOC arrows for several years. I killed a bunch of deer with them. That said, I found that a normal weight wood arrow flew at least 15 fps faster. On our skittish southern deer, that means it is more likely that my arrow is on the other side of the deer and bloody before the deer has time to get out of town.
I do still shoot single bevel broadheads, another product of reading the Asby studies.
There is no free lunch. Every advantage gained will always be accompanied by some new disadvantage. The trick is to ferret them out and decide if we can live with it.
I believe, the greatest number of bowhunters are in Wisconsin, Michigan and Penn., and deer being Whitetail are hunted mainly from tree stands. Shots are close, and an arrow in the range of 9 - 11 gr/in. would seem ideal, unless you are planning to hunt buffalo in Africa. If you intend to hunt out west, the only thing that would help is a heavier bow and arrow with a greater range, like 180 fps or more.
If we could look back through the records, I believe the Zwickey broadhead (two or four blade) on cedar shafts has killed the most deer.
Realtively new to trd bows, my first recurve harvest was 2019. (I have 19 with compounds) That was a 46# Max 6 ILF pushing a 390 grain, .500 Aftermath, with 125 Snuffer. Speed was around 190 fps.
On a slightly quartering away, it sunk in up to the feathers, but then fell out as she ran off. She made 62 yards from where I shot her.
So either way, I am good for deer. As long as I don't get deflected shots like last year. Same treestand, one delected low, one delected high.
I seem to think that i it wasn't for bad luck, I wouldn't have any luck. But, boy was it exciting!
Bill, if you're hunting whitetails it's not going to matter. Any well placed shot will have an entrance and an exit, unless you make the best shot and that will have the broadhead impacting the off shoulder blade. That shot goes through the most body.
Orion is on to something… Wood and aluminum shafts have higher GPI than carbons.
You can get a 500 grain arrow from wood are carbon shafts without having to add a heavy head. The weight is distributed throughout the shaft. On woods and carbons the heaviest head I used was 160grain.
Granted that one doesn't need a high FOC arrow to kill deer size critters, but Ashby has shown that higher FOC definitely improves penetration on bigger critters, along with other factors like skinnier diameter shaft, well flying arrow, cut on-contact head, etc.
Because carbon arrows are so physically light, one usually needs to add weight, which most folks add to the point rather than using arrow tubes, to get an even medium weight arrow, say 9-12 gpp. Long story short, it's difficult to build a carbon arrow without a lot of FOC. Serendipitously, we get the benefit of better penetration, and some would say arrow flight as well.
I believe in FOC as an added attraction. However...i also believe in another concept...if a " normal " arrow that is well suited to a bow can kill a deer, with two holes, does a faster, or heavier, or wider arrow kill it better ? Most of us hunt deer. A very large bodied buck is still rarely over 12 " thick, meaning the actual thoracic cavity is several inches less.
I believe, but when is enough....enough ?
When I lowered my shooting poundage to 45# and started shooting carbons, I found that I needed higher FOC so I use 250 grain point for a .500 spine shaft. This setup gives me a 540grain arrow with 12GPP.
I shoot Black Eagle Vintage shafts so I can also use a 42 grain insert and a 200 grain point or 100grain insert and 150 grain broadhead.