Cedar static spine v carbon

[Lee Lobbestael]

What static spine 11/32 POC shaft is closest to a .500 spine carbon?

[Orion]

63# exactly, so 60-65#.

[Lee Lobbestael]

Wow that seems much heavier than I imagined. I shoot a .500 out of my 49 pound longbow

[KentuckyWolf]

Point weight?

[Lee Lobbestael]

I'm shooting 250 plus standard insert, but I was just wondering about static spine not dynamic

[Orion]

Most bows will shoot a range of spines well as long as you don't underpine.  Too, the .500 carbons you're shooting are likely skinnier than wood, which places the center of the shaft closer to the center of the bow, which enables (and sometimes requires) more spine. And, with 250 grains up front, you're softening that .500 dynamic spine.

With a 11/32 wood shaft and a lighter head, you could probably get away with less spine, but probably not much, particularly if you're shooting a low-stretch string.

[M60gunner]

My 48# recurve with carbon back but not cut past center bow likes 60# spine cedars. Seems odd but they work so that’s what spine I shoot. It also likes 35/55 GT trads.

[pavan]

What bow, what draw length, what bow string.  Sometimes,  bows will have a different response to different materials, no matter what the dynamic charts say.

[Lee Lobbestael]

Thanks guys. It's a hybrid bow of my own making. Cut to center with a Velcro strike plate

[pavan]

I would go to the 3 rivers dynamic spine chart as a starting point.

[Lee Lobbestael]

Pavan, I hate to be difficult but the 3rivers spine chart tells me to get a much stiffer arrow than I need. My bow bareshafts a 29 inch dark timber .500 shaft with 250 grain point perfectly. Wish there was an easy way to tell what cedar arrow would work for me with a 190 grain point

[pavan]

what is the draw weight and draw length and what insert weight on the .500?? if you are using a minimum insert weight, not sure what that is for that arrow .  Either way you must be shooting around a 40 pound bow for that arrow to be perfect.

[pavan]

I would start with a 55-60 with the 190 grain head and 29" bop.  If your draw length is less than 28" 50-55 and shorten the arrow accordingly.

[pavan]

I just got in from shooting 250 shots with a 55@26 3/8" outside of center longbow with 60-65 27" bop Acme cedars with 190 grain heads.  If hit the 26 plus draw length they are perfect, on a few down flat on the ground goof ball shots, I short drew a couple and I could see a little bit of extra wobble in the recovery.  Theoretically, according to the chart, that bow should be shooting something 20 pound lighter.  I tried one shot with such an arrow, it skidded off of the bow and went 6 feet off at 20 yards.  I was lucky that it did not break and stick in my hand.  I have seen many times that one can get by on the stiff side with cedar arrows, I have also seen slightly stiff carbon arrows go wacky out of the same bow.  If your wood arrow is too stiff it will clank the bow at the nock, if it is way to light it will pile drive into the bow.  I have seen both, on this particular set of arrows they clicked with 160 grain points and went smooth quiet and perfect with 190 grain points, A good excuse for me to use my 190 grain Ribtecs just as they are.

[Lee Lobbestael]

Ok thanks Pavan I'll try that