How to Load a Coatesman Double Roller (CDR) Speargun 

It should

Pablo, The mech and barrel are more than strong enough. I do prefer the carbon tho. It makes the gun better balanced in the water.

drop me an email at saltydiver@gmail.com

half barrel + 5cm 👌

@@CoatesmansSpearfishing thx for the quick response 🤙

Is this setup for full pretention?!!!

Always go pretension. Watch the first 2 videos in the Unrolling the roller series. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-ixV0Jcwk3eY.html

Jedidiah, It does get a little more complex / flexible With the two 14mm rubbers you have enough power to make the rubbers half barrel +10cm or even +15cm in some cases. This allows you to easily hand load. You can stick to the +5 if you want max power

@@CoatesmansSpearfishing thanks Chris! I currently have 16M basic neptonic rubber. Would half barrel + 5 with 2x16mil bands be too overkill? I would be shooting wahoo And yellowfin from 10kg to 60kg with 8mil shaft. Thanks again this is super helpful.

@@CoatesmansSpearfishing I have a 130 double roller btw.

@@jedidiahakao345 Start with +10cm with 16mm / 8mm shaft combo.👍

On a longer gun like a 1300 hand loading is difficult and becomes somewhat ineffective, even with 14s. Better to make life easy with a load assist.

@@CoatesmansSpearfishing any power comparaison between double roller with 16mm and single roller with 18mm ?

@@clementcornaille5167 mate i would stay off the 18 mm in rollers. A single roller 16 mm set up correctly will easily match a 18 mm roller especially if you stretch your bands to the same total load.

In EU we us 16mm on bigger rollers

18 mm in a roller is a bad set up.

@@aldogjipali2835 have you tried it ? And what was your results ?

@@NorthernBorderBoys i never have but because I have studied rubbers in physics, I can calculate the energy that the spear would get. Rather than using 18mm I would say, use 16mm but just stretch them a bit more. The rubbers will get used a bit quicker though. To put it into perspective, if you want more power, you can get the same pull in kg with a 16mm rubber but that would mean you would have more preload with the 16mm. Also you would get a smother shot.

@@aldogjipali2835 that makes a lot of sense 👍 Thanks for the reply and explanation 👍