I shoot the ACC 3-49's without flaws for years out of my 70 lb Vortec set at 68 lbs and now out of my 70 lb Allegiance set at 70 lbs...my arrows are 27" long weighing in at 381 grains with a 100 grain head and Blazers.
Keep them as short as possible and keep the head weight down to 100 grains or less and you should be fine for target arrows. If broadheads give you problems try going down to an 85 grain head and see what happens. I shot 3-60's at 29" and 70 lbs with a 125 grain head for years and they worked well.
I shoot the ACC 3-49's without flaws for years out of my 70 lb Vortec set at 68 lbs
I shot the same bow and arrow setup as Rob posted for several years with great results. Now shoot all carbon arrows because of cost. You should be fine.