Ok,
I need some help from the experts. I'm a polespear and pneumatic gun guy. I do have my bluewater Koah gun, I've never shot a band gun in the back yard.
Anyway. I got this beater speargun US-Diver I got off of ebay for like $20 . It's like 2 foot long. Anyway it can handle 3 bands.
My goal was to collect some data on a new spear point that can crack rocks. Been doing to much metallurgy reading at night and get too many new ideas...
Back to topic, I got rid of the line, I made a new fitting that fit on the shaft that sits in the muzzle. Made a quick part to hold the tricut point material I want to test.
I started with one band and was like 20 foot back from 2' x 3' 1/8" thick Steel plate. 1st shot dropped into the dirt. Anyway I added second band and got closer. some of the shots the shaft hit the plate sideways.
Shots were all over the place, I got a couple hits, but nothing consistent Like I wanted. I finally went to 3 bands.
The spear shaft was totally bend at the 3rd notch closest to the tip. I'm not sure if it was from the exit from the gun, or the bounce off the ground. My Son said the shaft was crazy looking in flight, meaning it was worse than the other ones.
At this Point I went for Pole spear and piledrived the Steel plate and the tip did really good. Going to shoot some hard rocks later in the week for a better test.
Any thoughts on what I was doing wrong using the speargun. I can't be the 1st to shoot one out of the water. The lack of line and drag must have changed the dynamics of the flight, the bent shaft, not sure.
The gun and shaft and outside in the dirt. I'll retrieve and post pictures if that will help.