I think best is not to go over 15mm small ID bands as the contraction of the bands of the thicker material is slow. I use 8mm @ 150cm a lot with 2 x 14.5mm bands. The 3rd band doesn't add much power and better is just to improve your loading technique and go for higher band stretch on 2 x 14.5mm or 2 x 15mm bands. I use this setup for large dogtooth and large YFT with great success. Also remember that a 7.5mm shaft is an excellent option as well. In some cases a 7.5mm shaft will perform better than an 8mm shaft if using 2 bands.

A 105 has a lot of band stretch so 2 x 14.5mm small ID at a good stretch will be the best option. 2 x 16mm small ID will probably not have fast enough contraction in the water to take advantage of the 7.5mm shaft. You can check out my video here where I test different shafts with different band setups here kzbin.info/www/bejne/fISuZXuhoM6gjs0feature=shared

Wow ... thank you for compiling all that information. 100% accurate! For bands Primeline are very good ... with regards to diameter, I think the small ID bands at around 14 to 15mm are best because it seems that contraction speed in the water of the bands is more important than thickness (to a certain point). It seems that water resistance hurts the thicker bands and thus energy is not transferred properly for light shafts up to 8mm diam. On heavier shafts the band contraction velocity is less and thus thickness of the bands becomes more important for transferring energy. However even for 8.5mm shaft I would still not use anything thicker than 15mm small ID. Of course with roller setups the equation is different as band contraction is different.

@@majdq8 New tests on short rifles would be interesting. For example, an Abellan '65 or 75' with a 7.5 short rod could be an excellent Mediterranean agguato speargun ! As for your incredible albacore , also for shorter guns I suspect that a thicker shaft with proper setup ( maybe 3*14 small id, instead 2*14,5/15 small Id) can improve dramatically performance…. Thanks ! waiting for new great videos !

@@majdq8 Hi Again Majd. Thanks for your feedback. I purchased a Salvimar Nightmare 115. The new Salvimar Nightmare is exactly the same as the Hero. The only difference is the name and the upgraded Primeline bands compared to the Hero. This 115 Nightmare comes stock with a 150mm x 7.5mm shaft and thick 16mm ''Primeline'' bands (I am not sure yet if those stock 16mm bands are micro ID or standard ID). For sure, I am looking to change those tick 16mm bands to one of the following new bands from Salvimar : *Salvimar green Primeline ''HURRICANE'' 14.5mm (Micro ID 1.6mm inner diameter) The compact compound with high hardness is developed to maintain power unchanged after the speargun has been loaded. Recommended for spearfishing with the waiting technique and for those who prefer reactivity and explosiveness. *Salvimar black Primeline ''PRIME'' 14.5mm (Micro ID 1.6mm inner diameter) Formula designed to obtain an optimized elastic modulus that guarantees an excellent ratio between loading effort and power return. This makes the PRIME compound versatile and suitable for all types of fishing. It seems like the green Salvimar ''Huracán'' by Primeline bands are denser than the black Salvimar ''Prime'' by Primeline bands, I think the best fit would be those new green Primeline ''HURRICANE'' 14.5 Micro ID bands and combine that with a new 150mm x 7mm Sigalsub Tahitian HRC shaft, or do you think I should better off with a 7.5mm shaft since the gun is a 115 size? Looking forward to your reply, and thanks again for all the information you share with the spearfishing community.