I shoot similar specs and didn't want to mess with double shafts. I found that the AD Big game shafts can handle alot of weight up front. I only draw a little over 29". With a 30" arrow, 100 grain brass insert, 210 grains of pdp weights, and a 200 grain field tip, they fly great with an estimated draw weight of 79# from my Morrison Dakota. The spine is listed at .200, but I dont think that conventional spine applies to these arrows. Oh, and no those inserts won't work.