Matt,

I've been shooting ACC's for the last 4 years and for durability I would say they are no more or less durable than standard carbon shafts. I have bent some, but I believe that had they not bent the carbon would have splintered on a regular carbon shaft. Of course, I have no way of proving this, but I've shot both for a while so I don't think carbon would survive what bent the ACC.

I would recommend a 3-49 for your set up, perhaps a 3-60. You're kind of on the line. I was in the same boat and cut an inch off of my arrows so I could use 3-49s.

My finished arrows are 371 grains before weighting. That is with arrow wraps, 2" Blazers, Unibushing and G Nock, aluminum inserts, and a 100 grain head. I add weight tubes to get my arrows up around 425 grains.

My FOC is around 10-11% and I cut the weight tubes short and leave them in the front of the arrow to help with that a bit. The FOC is not a huge deal to me because I shoot expandables, but I do like to practice longer shots so having it above 10% is good.

As far as how I like the arrows, I love them. The only thing that has made me consider changing is the fact that FMJs are heavier and would allow me to not need the weight tubes. I could also use the Smart Tracer nocks in them if I could ever find them again. Right now I doubt I'll change though.