How To Rig Bluewater Roller Speargun to Breakaway
We designed the Neptonics Double Roller be the perfect bluewater speargun for travel. The 54 Double Roller has the equivalent band stretch of an 80” conventional speargun. It is perfectly ballasted in the water, and with a spear shaft it is 17g negatively buoyant.
Roller Speargun Basics
The biggest difference between rollers and conventional spearguns is the bands. Roller spearguns have the bands start underneath the speargun and move up to the muzzle. The bands have to have tension while at the muzzle to work properly. This is called pre-tension. It allows the spear to accelerate the entire length of the speargun. It also allows for more total band stretch. We tension the bands on out double roller to be pre-tensioned at 10%-20%. All of these things put together result in increased range and penetration in the water.
Spectra is the best shooting line for roller spearguns because of the roller head. Shooting line flexibility is important to prevent entanglement on the roller muzzle. We always tie our spectra on with a double figure eight knot. It is the strongest knot for keeping line strength. The weakest part of any line is going to be the knot or splice, so you need to be aware of the strength of your knots.
Be cause the distance these bands are pulled are longer the range of these spearguns increase. That means we need longer shooting line than a comparable speargun. Three wraps of shooting line to a double roller speargun does the trick. Two and a half wraps works fine if you have it rigged to a bluewater reel.
Floatline Breakaway Adaptor
The Floatline breakaway adaptor is our preferred method of connecting our shooting line to a floatline. We use a double figure eight on the end of spectra to make a good connecting loop. These are durable and reliable connection points that are easy to use. They make for the quickest way to change out shafts on your bluewater system when you bend your shaft on a large fish.