these arrow are working just fine for me . I use them for 3d shoots
I have them set up with a 85g tip & 3" vanes & 3" feathers !/2 dos. of each, arrows are speed pro max. I do use a HCA TSS bow
set a little over 60#s ( my bow at 7029 will shoot 225g arrow at 350fps)
If you don't have a HCA you need to stay to mfg. recommendations
with a 100g tip it is easy to get a 300g arrow to use with a 60# bow & you will be very impressed with that set up
I have a friend shooting a Mathews Legacy ? at 60#s 27.5 " draw shooting gt arrows at 258fps & with the speed pro max arrows it is shooting 289fps both arrow with a 100g tip
(not slamming gt arrows)
Gregg