The Simms labs limbsaver crossbow kit worked very well on mu Horton XL 175. I used regular cats wiskers string silencers and also put a piece of shrink tubing on the arrow holder in addition to the limbsaver thing that goes on it.
Funny you ask. I have been hearing alot of good reports about the new BowJax crossbow kit. I picked one up tonight and installed it on my Excal Vortex. Took a couple shots in the garage just to try it out. I must say that i did feel a significant reduction in vibration and less of a "twang"(you excal shooters know what I mean).
The kit includes 2 limb dampeners, 4 string silencers and 1 bolt retention dampener. I did not like the rentention dampener on the Excal. Because the spring sits low against the rail on Excals, the dampener was rubbing on the arrow, which should slow it down a bit.
I need to get it outside and do some more shooting but my first impressions was that it helped.
You can also try the STS system. The noise on the Excal is coming mostly from the string,arrow retention spring, foot stirrup and possibly a few other places. The STS system helps the most. Some rubber hose split in half and slipped over the foot stirrup will help too. We use some stick on dampners on the arrow retention spring too.
We don't use anything in the string. Anything you put in the string will slow it down.
what bout some sticky backed felt on the top of the arrow holder on excal's that you get from craft stores....i can't hear my arrow holder vibrating with each shot, just the string hitting the STS....arrowhead you know anything bout excal's STS system they are making for there xbows.........bob
We use a Limbsaver #3410 insulator strip "cut to fit" for the arrow retention spring. It works good and takes care of the vibration.
The rumor is - Excalibur is working on a string stopper. At this point it's just a rumor. My feeling is, they will have one available next year.