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All About Guns What's your weapon of choice, and why? Discuss the beloved speargun here!

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Old 10-15-2018, 01:01 PM   #1
doyenofcastle
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Join Date: Mar 2015
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target results

I have done some test recently for 4 guns I am using ,results :3 guns shooting almost accurate except one 110 gun with 6.75 140 cm spear hammerhead ,2 rubber sigal small Id 14 360% ,my question how to analysis the shooting target results ? attached target picture ,when I load both rubber to the first near fin it shoot either center or left 50%/50% ,, load the both rubber to each fin all shoot to the left high precision ,single rubber to the last fin near trigger it shoot always center down gun details :track is shallow 1.5mm deep ,one wishbone is 1.8mm and other one is 4 mm neptonic dynema ,rubber slot is tight for rubber 13 mm width ,anyone can determine where is the problem ?
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Old 10-16-2018, 06:31 AM   #2
Nicholasclf
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Re: target results

Maybe both rubbers at 360% is overpowering the gun. The 6.75 shaft may not be able to handle all that power.
Retie the band for the rear notch using a longer wishbone (which will decrease the stretch ratio) and see if that changes anything. If it doesn’t change anything retie the other band as well (effectively reducing the stretch % on both bands)

Also, are you gripping the gun firmly when you shoot?



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Old 10-16-2018, 11:30 AM   #3
doyenofcastle
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Re: target results

are you gripping the gun firmly when you shoot? yes and its very low recoil as the gun is well ballast ,I ll try tomorrow morning ,I remove the thick wishbone and replace the 2 band with single 16 mm 330 % ,visibility here is very low I can't see more than 3m in murky sea .
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