I just replaced my string and cable on my 04 bowtech liberty VFT. I didn't have the speed nocks reinstalled. Instead of the Bowtech string with hush kit and speed nocks, I just had a plain old winners choice with string leeches. Has anyone did a test to see what the speed was before and after? Or with and without speed nocks.

I am almost maxed out at 70lbs and shooting a 436gr arrow 255fps with a 29" draw.

Before the string was replaced I was shooting a 460gr arrow 248fps at 66lbs. So I am kinda thinking they did make a difference.

I know I could knock the poundage down, and get my old arrows and see what they shoot now.

But figured some bowtech experts could tell me the quick and dirty answer.

Its shooting better than ever, but also I am getting some horrible vibration noise from the string. So debating on whether to try toput the hush kit and speed nocks on.