Edge grained Maple backed Yew

[DC]

In my case it's just a matter of me having a crummy release. I would think that a 3-4 fps difference with a finger release is pretty good, I know I'd love to be able to do it. Makes me wonder how consistent a real good shot would be ?

[BowEd]

That bow there DC will kill any big game animal in the USA consistently at 20 yards and more if you can put it in the 10 ring at that range with a 600 grain arrow.I'll gaurantee it.With the ease of shooting a 40# bow too yet.
Good build buddy.Something everyone should take note of here too.

[Badger]

  I don't test anywhere near as often as I used to but when I am testing regularly I can pretty much match the machine and stay within 1 or 2 fps. Most regular hunters I know shoot about 7 fps or more below machine speeds. Shooting by hand can also pump up a reading by using a well timed forward movement of the left hand. You can add up to 10 or more fps to a shot. Lately I have been testing by hand, I fixed my machine recently so I will see how close I shoot to it.

[DC]

I tried a 348 grain and got 202 fps, arrow broke on the first shot.
I tried a 298 grain and got 215 and 212 and the arrow broke on the second shot.
I don't want to do any more, arrows are too much work

Ed, the heaviest arrow I have is a 557 grain. I got 169 fps. Boy, the weight sure slows them down.

[DC]

  I don't test anywhere near as often as I used to but when I am testing regularly I can pretty much match the machine and stay within 1 or 2 fps.

I'd kill to be able to do that . After 70 years I've pretty much reconciled myself to having very poor hand eye coordination. I've always been able to build things but I've never been good at sporty stuff. I think the technical term is klutz. That's why this machine is the answer for me.

[bjrogg]

 Very nice bow DC. That's  thinking out of the box for sure. Those are some pretty impressive numbers. Those heavy arrows might not start out as fast but in a short distance they they keep moving longer on the other end of their flight.
Bjrogg

[Bayou Ben]

That’s a sweet bow DC.  170 FPS with that weight arrow and only 40 lbs is great.  Best of both worlds.  Hunting arrow, great speed, and only a 40 lb bow. 
I haven’t tried yew yet, but that seems like an excellent combo you got there. The one maple backed bow I built was actually faster than my bamboo bows, but it exploded after around 100 shots.   
I love the shape of the bow too with the deflex and recurves.  I think you have found an excellent design.  Great job

[DC]

I just copied Marc St Louis, to give credit where credit is due.

[Badger]

  DC, I did some calculations on your bow based on the numbers you supplied. This bow has a virtual mass of something like 70 grains and shows no losses to hysteresis. You could expect to get about 250 fps from a 200 grain arrow which could put you well into the 400 yard range, maybe 450 yards. I would be tempted to shoot that in the 35# classes and just draw it maybe 24" using a 22" arrow. Lots of potential.

[Stick Bender]

550 grain 170 fps 40 lb would be a awsome dear or elk bow 👍🏻👍🏻

[leonwood]

I like the combo with yew and maple. Pretty bow and great speed. Like Steve said I would try that for flight just to what that it can do, lots of potential with those arrow speeds.

[Whiskeyjet]

Very cool bow!

[DC]

Thanks guys. Just to make myself happy I mounted my second Chrono to the shooting machine and got the same results within a couple of fps. Flight shooting around here is tough, there is no open spaces. We managed once in the last year.

[Badger]

DC, can you do a force draw in it if you have time?

[BowEd]

DC...I figured a 600 grainer would go around 160 fps.So it's right in there.