Chek-Mate Crusader longbow, [email protected]"
Full length POC shafts, 75/80 spine
125 grain point

If I get a decent release, I can shoot these arrows at least 20 yds with no fletching (field points only).

Spine charts are only meant to get you in the ball park--two archers shooting the same bow, with the draw length, string, point weight, etc. may need different arrows.

Arrow length, point weight, if the shelf is cut shy of, to, or past center, string material, number of strands in the string, nock fit, your release, draw length, etc. will all have an effect on what spine arrow you need.

Chad