Have you tried Stu's calculator. I was going to plug your numbers in for you but needed a few inputs.
If I make a few assumptions with the calculator such as you are pulling that bow to 28" and it has a FastFlight string (I know they can handle those) and the riser is cut to center(including whatever buildup you may have), then the calculator says the bow needs 57.7# of dynamic spine. Of course, if the thing isn't cut to center or you built the rest up, or you don't really pull 28", then this doesn't mean anything.
When I do your arrow on the calculator:
(1) if you are shooting with 5" feathers and no wrap, then with a 100 gr insert you only get a dynamic spine of 42.5#, which would be too light
2) assume same feathers and no wrap, then the calculator shows that arrow at 58.5#, which is very close to what it says the bow requires
For comparison, I shoot a 48# Leon Stewart longbow, but only pull to 27". The calculator shows that for me that bow needs 53.5# of dynamic spine. I shoot a 29 1/4" 2016 arrow with (3) 5" feathers and no wrap with a 125gr point just fine out of that bow. The calculator says the spine of that arrow is 57.6#, which should be a little stiff.