The 900 Single Rollergun - Unrolling The Roller Speargun

 

How to setup a 900 single roller speargun

In this spearfishing workshop episode, I cover my favourite single rollergun setups, starting with the 900cm speargun. This is the setup that I have found to have a good balance between power, accuracy and the overall feel of the gun. 

Possibly one of the greatest factors that determine the setup I use is buoyancy. A 900 roller first off needs to have enough buoyancy to float the roller gun with the shaft out. Must remember that all the components on a gun remain the same, but the shorter the gun, the less volume /buoyancy you have to play with.

A carbon barrel in this case is essential, and also adds to counter the weight of the shaft. Even then the carbon barrel will only be buoyant enough for a 1.3m 6.6mm shaft. But if you don't mind a slightly heavier muzzle then a 7mm works really well too. 

Being a short gun makes the 900 easy to load. So I prefer to hand load 14mm bands which have more than enough power to drive the 6.6mm & 7mm shafts.

Lengths will depend on your rubber. 45cm (400% when loaded)  is as short as I would go if you can load it. 50cm is a good length to start with. 

Speargun Setup:
Gun: 900 Carbon Rob Allen Speargun or similar buoyancy

Rubbers: 14mm @ 45cm -50 cm

Pretension: Maximum

Spear: 1.3m 6.6mm shaft – double wrap 1.8mm Dyneema

Cheers

Chris #spearfishing

Unrolling the Rollergun Part 3 - The Load Assist

 

Unrolling the Rollergun Part 3 - The Load Assist

Next in Coatesmans spearfishing series is how to use a load assist. To use a correctly pretensioned rollergun using 16mm or 18mm bands, you will need to use the right load assist. This episode covers which load assists work best and how to use them.

Unrolling the Roller Speargun Spearfishing Part 2

Unrolling The Rollergun - Spearfishing Tutorial

Unrolling the Spearfishing Rollergun Series Part 2 is now up. In this spearfishing workshop episode, I cover the difference between the standard preload and the full pretension preload on rollerguns. Here is the newest version of the Coatesman Double Roller:

Unrolling the Roller Speargun - Part 1

Unrolling the Roller Speargun - Part 1

Unrolling The Rollergun video series is a follow up to the rollergun articles I wrote in the Ultimate Spearfishing Magazine. Over the past 6 or so years there have been a few changes in understanding and the practical application of rollerguns in spearfishing.

I hope to address these changes and in a practical way help guys understand how and why rollerguns need to be setup. This intro into roller spearguns covers the basics as well as some basic science to explain how they work.

Read the original articles here:

Unrolling the Roller - Roller Gun Test and Setup Comparison

The Ultimate Rollergun Test