Uukha Limb Speed


AIUK Saviour
I have a pair of Evo2 medium length limbs #28 at recommended brace height + 20mm. My ACC 920 shoot as expected with these limbs. I upgraded to a pair of SX50 #32 to allow me to increase poundage if I wanted to. I set the bow up the same as the evo2 limbs #28 (limb bolts turned out measured with bow scales) at draw length. My arrows are 'disappearing right' (right handed archer, as though they are too weak!) Are the sx50 limbs faster than the evo2's resulting in the 'weak' result?