Thanks folks. It makes me glad to know that there are responsible hunters out there.
BTW, these neighbors are very nice, very neat, very religious, typically keep-to-themselves types.
However, another bit of history: Two year's ago the neighbor's 12-yr old son and his young friend walked into my barn to "shoot at pigeons". I was home, and thought, who the heck is shooting out behind the barn, ran up there, and saw them at the barn door with their guns. At any rate, I was furious and freaked out on them, gave them a good yelling at, and went and talked to their father, who came over the following week and repaired the holes in our barn roof and apologized for them. Needless to say the boy is still afraid of me (good). He said he and his friend were "shooting rabbits" out in the field and got carried away and thought I'd like it if they shot the pigeons in the haymow. Obviously they had crossed the line in a major way, but after I calmed down, I chalked it up to stupid things boys do when young, and I know they'll NEVER do it again. I wasn't going to press charges and try to get the boy jailed or something.
I'm mentioning that, because I feel like the farm families around here, though good intentioned, have a very casual relationship with their rifles, and are NOT considerate to those living in the area.
I think one reason they set up elk-rifle target practice toward my place (they were far away, but not far enough) is because they were AVOIDING shooting in the direction of their own farm and the highway in the other direction, and they "assumed" the bullets wouldn't reach as far as my place. (Wrong).
They always tell me "we are acting safely" and "we are NOT shooting at your house". Like I said they go into denial.
If they shoot 99 times in the other direction, and just 1 bullet heads towards my barn and livestock they seem convinced that they are not doing anything wrong. Me walking up with their bullet still doesn't seem to be convincing.
It's a major problem for me too, because on those days that I can hear gunshots from their property I am not comfortable walking out to check my pasture fencelines, visiting the creek, bicycling out the lane, or any number of activities.
Anyways, I will certainly have more "ammunition" to deal with anything that happens this fall with knowing the regulations. I may just discuss it with them prior.