roller vs standard speargun, range and penetration

This is a comparison of range and penetration between two 90 cm spearguns.

I tested both spearguns at 5 meters from tip of the shaft to the target.

The results are interesting and completely dispel many wild claims...

I'll add a note because people get confused about pretention. This gun uses multiple tabs and a two step loading procedure. This increases the capacity for pretentioning to the extreme. For instance, the pretention on this gun would make it very difficult to load with a loop. The coeffiscient is 3.7 (not crazy but optimal for this setup).

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