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Where can I get me one of those 30 ft barrels? I got a shotgun that needs just a little more reach....
Actually, I'm not too surprised about the results. With a small cartridge like the .32, the powder would burn up quickly and not continue to force the bullet to accelerate down the full length of the barrel. The volume in the barrel behind the bullet increases as the bullet traveled down the barrel, but the gasses have stopped expanding faster than the bullet is travelling away from them. Then, friction becomes the governing force and the bullet slows down. Also, I think it's possible that if the gasses can no fill the volume behind the bullet, it would create a vacuum effect, slowing the bullet down even more.
Just my thoughts...
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