A 30-30 is a supersonic rifle with a rather distinctive "report" that can
be heard for miles around. It actually makes 2 noises, a "bang" from the
explosion of the cartridge and a "crack" from the sonic boom of the bullet
going by. Depending on where you are standing in relation to the shooter
you will hear more of one or the other (and if you are far enough away,
you won't hear them at the same time). It is this "crack" that makes it
distinctive. This sound is quite different from a subsonic gun.
I am going to assume that neither of these noises is actually coming from
the horse's knee. If I am wrong, and we are talking about an actual 30-30
here...well, I would have to agree with Tom, anybody who caused such a
noise to come from the joint of my horse would be a candidate for being
hit over the head with a baseball bat.
I actually would rather not hear any loud popping or cracking noises
coming from my horse's joints at any time, but am willing to admit that
joints (both equine and human) do "pop" on occassion (it drives my mother
crazy when I do it to my knuckles). And I would consider hearing one loud
enough for me to compare it to a noise that comes from a supersonic rifle
to be an indication of a great deal of insult to the joint, and I couldn't
imagine then going out on a 100 mile ride.
...but that's just me.
Orange County, Calif.