I shoot a bow with 241 fps and a KE of 60 ft-lbs . . . and I carry and use when I can a laser rangefinder. [X(]

Washington State does have legal requirements for our arrows. Expandable are prohibited. We must shoot an arrow of 20 or more inches in length (including broadhead) and it must weigh 6 gr per pound of draw weight.

Kinetic Energy is a law of physics but not an instrument used to measure penetration. It is a product of and is dependent upon mass and speed. It is logical . . . to me at least that the greater the KE the more penetration we can expect. Each of us must develop, with our equipment the combination of two that works for us and develops a KE factor that will allow us to harvest the game we are after.

So far all of my shots are passthroughs so my combo works great for me.