No, not even close actually......with that model you are losing only 1fps for every 6.25grs of arrow weight which is impossible with today's technology.

Most single cams lose somewhere in the neighborhood of 1fps for every 2-2.5grs of arrow weight added. Each cam system will be a little different, but most including your LX's cam system should fall somewhere between 2 and 3grs.
Very effecient cam systems will normally be in the 3gr+ range.
I think I gave your bow 1fps for every 2.5grs of arrow weight.

Just trying to help ya out......no wars here.