I just changed the limbs on my '04 B/T Mighty Mite from 70 lb to 60 lb max. I was shooting at 64 lbs DW prior to the limb change. I am presently using my oldarrows which are GT XT 55/75 at 27" (4" feathers) and 100g tips. I am looking for advice to determine if I need to change arrow spine. I am going to buy a dozen new arrows --- just want to make sure I buy the correct ones. I have narrowed my arrow choice down to GT XT or Easton ACC. I shoot a release with string loop, and a MZE rest. Do I need to decrease my spine? It appears as though my bow shoots fine --- but I can't help but wonder if I'm spined too heavy. Any advice is appreciated.

I don't know offhand, but you can go to eastonarchery.com and they have interactive charts where you input your specs and it spits out your arrow options. I assume most manufacturers have the same thing but I have never checked.

You should be spined just fine at 60 lbs with the 55/75's. They are spined to .400" and that is fine for your set-up.

According to Gold Tip you arevery stiff,But if they show a stiff spine when paper tuning then go with 115 or 125 grain heads and be good.Also thats much cheaper than buying new arrows

You'll be just fine w/ the 55/75s. That's exactly what I shoot out of my '04 Pro 40 dually at 60#.The Bowtechs have always liked a little stiffer arrow.

10/4 ----thanks guys. I have been shooting my last few arrows and everything seems to be fine ----- I'm just a little anal when it comes to certain things. Thanks for the reassurance.