I probably should have provided that info up front. My bow is a Shawnee w/recurve limbs, 60", 46# @ 28"(3/16ths passed center), 5/16ths carbons. I'm drawing 29" so probably pulling 48-49 lbs, which is starting to get into that 'tweener' range. I can live with the 500's and 175gr points. I've killed a bunch of deer with them and sometimes short draw in the excitement, so a slightly weak shaft is in my favor, lol. I thought my draw length was always 28" until I discovered quite by accident a couple years ago when I switched to more of an "expansion" release coupled with shooting more when the weather gets warm, that it had increased to 29. Admittedly, it may have had more to do with my form modification than the extra 3 lbs. When I re-checked the tune the .500's had started to show slightly weak, necessitating the drop to 125 gr. I've got another bow (same pounds, but higher performance) on order and was just toying with the idea of trying .400 spine set-up for it. I know with a new bow I could be looking a different shafts anyway, but it's the same bowyer (ILF riser)and centershot will likely be identical.