Whatever "real effect" is. I guess when I start chasing elephants and Cape Buffalo, I'll figure that out. But for NA, 20% certainly isn't needed, and probably not even recommended.Listening to few podcasts with arrow builders and they say you don’t get the real effect of a heavy foc until you get to around 20%
I totally agree it’s not needed I was just wondering why it would take 20% to see real effects or benefits.Whatever "real effect" is. I guess when I start chasing elephants and Cape Buffalo, I'll figure that out. But for NA, 20% certainly isn't needed, and probably not even recommended.
Also a lot of that high FOC was done with trad bows. Granted there is merit in adding more weight in the front but if I recall, Ed Ashby himself said that when they tested compounds the results were so drastic that he just stuck with using traditional bows. And the only way to tell if FOC aided in penetration was with using the traditional bows.There is a lot of commentary on Uber FOC on these forums. ...and there will be guys that drank the Kool Aid that disagree with me- but here goes.
I too got wrapped up in EFOC many years ago before a Water Buff hunt in Australia...and spent a lot of time trying to get that very high 30% FOC recommended by certain folks.
What I got was an arrow that was less accurate. Of course YMMV....but it destabilized my arrow. Then I applied some common sense and realized we aren't talking a missile or another projectile. The same weight up front that stabilizes an arrow in flight....DE-STABILIZES it on the launch. All that weight up front has a strong effect on your arrow spine on the release making that EFOC arrow a lot more unstable. There is no free lunch in physics.
Then I realized a lot of the claimed benefits of very high 30% FOC was not done in controlled testing- like with a hooter shooter....it was a below avg shooter with a stick bow. And then some of those tests are with wooden dowels and rubber bands.
I concluded the guys pushing 30% FOC never back tested it against the exact same weight arrow with avg FOC like I did....as the avg FOC arrow was consistently more accurate. All that extra weight up front made shooting that setup more critical...especially of minor form errors that happen on something like a hunt.
I think a guy is better off concentrating on developing an arrow that has perfect flight, a tuned bow that shoots his BH's to the same POI as FP's and if he wants more penetration- shoot a heavier arrow. The heavier arrow has the added benefit of making your whole setup quieter.
The problem with using a lighter GPI arrow shaft, then throwing on a bunch of weight up front, makes for a much less durable arrow. I much prefer slimmer thick-walled arrows for their durability. Most all of those in my spines start around 11gpi and go up from there. You still get an overall decent weighing arrow and an arrow that can survive hard hits.I’ve found that using a lighter GPI arrow with a good amount of weight up front is best 125 head + collar and brass. You can achieve 15%ish FOC and keep your speed up too.