Brad... Its the never ending quest for the perfect 3D setup.
The 5575s with 50 grain inserts and 150 heads turned out to be just the ticket for the 60# limbs. Which is what I'll be shooting the next two days at our first 3D shoot and its going to make my shoulder SORE. But now I have the technology to make a CARBON arrow thats 510 grains go 190 FPS at my stubby 27" draw :D
So now, hopefully, I'll get a 450 grain arrow going the same speed on my 52#ers, and quit shooting 2nd and 3rd place.