Ok Ron, you are making me nervous. I most certainly would not want someone to get hurt. In the spirit of safety I decided to have some fun and see what kind of damage I could do by shooting a rivet set out of my Sioux 3X gun.
I stood about four feet back from my wheel barrow of ash firewood, with 50 psi set on the gun.
I loaded the -4 straight rivet set in the gun. No spring, no tape, the set firmly pressed back, the gun in a horizontal attitude.
With a bit of trepidation I pulled back on the trigger. The set shot out about two feet and dropped on the floor. hmmm
I then opened the door to the shop and with my thumb and forefinger holding the set in place I aimed the gun at an old Locust tree, about 15 feet from the door.
I pulled the trigger and held the set as long as my fingers could stand it, a couple of milli-seconds, and then let it go.
The set flew straight and true for about 8 feet.
Clearly I needed more pressure.
At 100 psi I repeated the Locust experiment a few times and 12 feet was as far as I could get the set to go. The tree is safe.
So there you have it. I think that it would be fun if more of you would try this experiment and see how far can you get it to go? Perhaps my technique is wrong?