Greetings.  Here's the deal, I have acquired a Fedora 560 hunter, 64#@28".  I draw just about the full 28".  So I want to shoot a 29" arrow BOP with a 160 gr bh.  I am looking at supercedars that are on evil bay.  These are spined on 28" centers.  So what spine should I get?  I have been told 80-85, 75-80.  Kind of confused.  These are tapered arrows too.  I will make them up with 5.5" feathers and mercury nocks.  I am using a dacron string.

Talked to Fedora and he recommended a 28.25" 2018 with a lite head on it.  Not sold on that idea though.  So anyways help and opinions are always appreciated.  keepem sharp

I would try 70-75.

I am thinking the final spine wt. will be 70-75 but to get there I need a heavier spine to start with as I am shooting an arrow an inch longer which in reality means 2" longer taking into consideration the point taper and the weight of the head.  

So here is my theory, start with a 30" arrow at 80-85lbs spine on a 28" center.  Trim to 30" allowing for 1" of point taper.  Then subtract another 5lbs of spine due to the 160 gr head and this shold be close to the 70-75lb spine I need.  Does anyone see anything wrong with this logic?  thanks and keepem sharp

What's a supercedar??  28" centers??  What??
Send me a PM with the link, I sure would like to take a look at listing.

Cedar arrows are spined at 26" this is the standard.  Been that way always will be.

The 'deflection', or spine on Superceders seems to be the same as any others, and I have bought about 100 shafts in different spines, and measured them all.
I had a 560 hunter-it is cut to center- my 55# bow used 65-70# arrows, cut to 29 with a 160 grain point-I think your bow will need easily 75-80, maybe 80-85 to get good flight.

"Superceder" was the brand name that my brother and I used selling barrel tapered Mississippi yellow poplar shafts more than a decade ago. They are spined by the old standard, a 2# weight and 26" centers. What works in spine for other wood shafts will work for these. The mass weight of them is intermediate between softwoods (cedar, pine, fir, etc.) and the heavier hardwoods (ash, maple, hickory).

I have about 100 dozen left, mostly 35-50# and 65-80#, plus some heavy weights. My ad for them was pulled because I had too many for Trad Gang's classified policy. I've been selling them instead on "that" auction site.

I agree with Bjorn.  With a cut to center bow, you can overspine a lot.  In fact, I think most cut to center bows do better when they are overspined, particularly with broadheads.

Well the super cedar thing didn't work out as they sold the 80-85's I wanted so am going with 2020 cut to 29" with muzzy heads.  I'll put 5.5" fletch on them with mercury nocks.  keepem sharp

PS  thanks for the info