Steve "Bookie" Bookout, my friend, received an invitation to attend the 4th Annual Bevel Brother's "Over The Log" Shoot held at "Bevel Down's" farm ("Wiseacres") in Weston, MO on 10/30/04 from Bevel Up. Steve extended the invitation to Dan "Hawkman" Thompson, Eric "Angus" Leonard and myself.
"Bookie" -->
"Angus" -->
"Hawkman" -->
"Hoot Al" -->
Never been to an over the log shoot before and we figured shortly after the
shooting started we would be official "chunk gun" shooters. This
turned out to be true. We had a great time and the everyone there was very
cordial and willing to share their knowledge.
There were several shooters present lined up along the hayracks waiting to start the shoot.
Bevel Down (Joel Gard - Left photo) gathered everyone around and explained the
rules for everyone prior to the shoot. Steve introduced
me to Bevel Up (Lowell Gard - right photo). 
The first thing we did was find us a log and laid out our tarps on the ground. The targets (sighters) are positioned 60 yards down range from our shooting position.
The rules were simple. You put up a "sighter" target or practice target and take 3 - 4 shots at the target. This ends up being your sighter target. Then after registering, you receive a packet of 10 targets. One shot per target. [More about that later.)
Once everyone has their targets set up down
range, the shoot can not officially
begin until the mortar is fired. The mortar shoots 12 lb. bowling balls
using 180 grains of 2FFG blackpowder. (Click the movie below and you get to see a
short video of the mortar shooting the white bowling ball. You might have to
wait a little bit for it to load. The screen is not huge, but hopefully it
works.)
Now we proceed down range toward our targets. Once there, you take your first target and slide it behind your original practice (sighter) target and try to center the X of the smaller target in the area where the group of bullet holes are on your sighter target.
Then everyone heads back to the firing line to take their one
shot turn. No big rush or time limit. The round is over when the last
person shoots their gun. The object is to take your time and make it
count. Once everyone has taken their shot, you all go down range and pull
the target you just shot from behind your sighter target and replace it with
another target. This continues on until you have shot 10 individual targets. The
scorekeepers measure the distance from the center of the X to the center of your
bullet hole. These lengths are then added up the total represents how well you
shot consistently. The lower the overall length the better. 
I learned a new phrase that day. "Don't be a chaser!" That means don't try to move your target away from your original group of holes toward the last hole you shot into your sighter target. In other words, your chasing after your next shot. They say that is a guaranteed way to end up with a really high overall score. To give you an idea of what my sighter target looked like after to the shoot, I'll paste it here for you to see.
I
brought my rifle "Becky" and Bookie brought "Durty
Nelly".
After the shoot, a fine lunch was served followed with the Bevel Boys mom's church Dutch apple dumpling desert. That was a prize in it's own right and well worth the 4-1/2 hr. drive to get there for. Here is photo of Mom.
Prizes
were set out and covered a whole hayrack. There were prizes available for
all the shooters present. The Grandest prize went to the World Champion of
the Over The Log Shoot. Here the winner is presented with an embroidered tie
with the names of past winners, a banner and a crown.
Amongst the participants was Don Getz, former owner (now retired) of Getz Barrels. Don shot pretty well that day. He came to the shoot with his son John. Don had nothing but compliments about the Rifling Bench manual Bookie and I wrote.