I got a chance to do a little chrono work today and here's the stats;

The bow is a BowTech Guardian set at 60 pounds and a 29 inch draw with factory strings that include a loop, kisser and Simms Super Leaches with no peep installed in the string. I chronoed the bow with Easton LightSpeed 400's with blazers and 75 grain points that weigh 325 grains.
The first average was 290 fps with an STS set up.
The second average was also 290 fps with no STS.
The third average was with my Rustler™string halter and it also did 290 fps..
No difference!!

The next test was removing the Simms Super Leaches and running the same set ups..
The first average was 301 fps with just the STS.
The second average was 302 fps with no STS.
The third average was with only the Rustler and also averaged 301 fps.

I was suprized that the Super Leaches was robbing my bow of 10 fps!! the STS was a little quieter but the rubber I used for the Rustler is not as soft as the STS stopper rubber. There is a definate improvement when using the Rustler as compared to nothing at all. I think my next project will be to make a slip-on, all rubber Rustler. It will probably look crude as it will be made using a belt sander but it's got to start somewhere.

By the way, accuracy is great with the Rustler. I know better to shoot at the same spot at 20 yards with a BowTech but I was concentrating on testing for accuracy and how quiet the bow was,, then this happened[&:]