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Old 04-16-2017, 09:36 AM   #1
Cobalt06
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Speargun testing bechmark

As i crack open this can of worms,
I wonder why no one had set a standard with testing guns? Since there is no standard, just set a method and use it over and over and it will catch on. How do you think they did it with surface guns.
My proposal which mimics real guns and is reproduceable over and over, is
100cm guns and down,
First get a gun vice and load and lock in each gun factory build and fire 3 shots aiming at a bullseye at 10ft and again at 15ft. Determine accuracy and shot group.
Next, shoot each gun into a block of ballistics GEL at 10ft and measure depth of pennitration for the shaft. This would give you a great idea of power each gun has from the factory.
For 100cm+guns change the distance to 15ft and 20ft respectively.
You can break down each size of gun and manufacturers if you want.

Just like real guns different shafts and bands will make different results. Just like a 20" barrel and a 24" barrel of the San caliber will produce different results.

Set the standard.
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Old 04-16-2017, 10:17 PM   #2
e.m.p!
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Re: Speargun testing bechmark

Most likely because the market for spearguns is ridiculously small compared to standard guns. Bigger brands have their own testing tanks, but why would they spend hundreds of dollars when people still keep on defending their favourite brand anyway? Compare it with i.e. cars: a Volvo may be the safest car out there by a far margin – even when tested under standardised tests. Still doesn't convince me though. It's out of my price bracket and not what I'd say I need at this stage.
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Old 04-17-2017, 11:16 AM   #3
RichT
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Re: Speargun testing bechmark

Quote:
Originally Posted by Cobalt06 View Post
As i crack open this can of worms,
I wonder why no one had set a standard with testing guns? Since there is no standard, just set a method and use it over and over and it will catch on. How do you think they did it with surface guns.
My proposal which mimics real guns and is reproduceable over and over, is
100cm guns and down,
First get a gun vice and load and lock in each gun factory build and fire 3 shots aiming at a bullseye at 10ft and again at 15ft. Determine accuracy and shot group.
Next, shoot each gun into a block of ballistics GEL at 10ft and measure depth of pennitration for the shaft. This would give you a great idea of power each gun has from the factory.
For 100cm+guns change the distance to 15ft and 20ft respectively.
You can break down each size of gun and manufacturers if you want.

Just like real guns different shafts and bands will make different results. Just like a 20" barrel and a 24" barrel of the San caliber will produce different results.

Set the standard.
something else to add...
Spearshafts (even expensive ones)
come in all kinds of straightness (including new) and many have major twists (including new).
I can't tell you how many videos Ive watched where this fact was/is completely ignored.
There are a host of other issues concerning spears that can throw off accuracy as well.

Did you know that a cheap spear will become less accurate each time you shoot it into something hard? Cheap spears have many weak spots in the steel. these weak spots give way after the shaft has been shot into something hard several times.
This is the same reason many shooters notice that certain spears in their arsenal simply become less accurate after awhile. It's because they get small bends/twists that reduce accuracy...

By the way...
I would also suggest removing floppers when pool testing.
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