ive used them yes, pretty sure RAY KNIGHT will tell you hes used em too. the length and width is the same on pro arc and xts500, just had a set of pro arc on my maxxis35 with RKT and no issues. 2010 bows use same DEF limbs as 2012 bows in same poundage. ive checked that with hoyt for matrix all years 2010-2012 and IE 70# is 84def on them. even side profiling looks identical to the eye, im not sure exactly what makes them different, maybe a name change only??? tiny difference in how they flex??? not sure but they shot great and i have 3 sets of pro arc and i wouldnt hesitate to use them on any 5/8 limbed bow thats 2010 thru 2012. dont think 2013 is any change either
and i believe they didnt go to pro arc till 2011 bows....