Home Tournaments Calendar Weather Merchandise Sponsors

Go Back   Spearboard.com - The World's Largest Spearfishing Diving Boating Social Media Forum > Spearfishing Gear > All About Guns

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

Thread Tools Rate Thread Display Modes
Old 01-17-2017, 01:45 PM   #1
Registered User
Join Date: Jan 2014
Location: Los Angeles
Posts: 186
Speargun Target Material

I'm getting ready to try out my new double roller in the pool and decide between a 5/16 and 11/32 shaft.

Anyone have some advice on the best material to make a target out of? Want something with enough density so that the spear doesn't fly clean through.

Grizzlestomp is offline   Reply With Quote
Old 01-17-2017, 01:56 PM   #2
Registered User
diveincanada's Avatar
Join Date: Aug 2010
Location: Montreal
Age: 51
Posts: 421
Re: Speargun Target Material

I use the cover of a big plastic bucket
diveincanada is offline   Reply With Quote
Old 01-17-2017, 02:35 PM   #3
Snorkel Master
kwtony's Avatar
Join Date: Dec 2011
Location: Lower Keys
Posts: 5,588
Re: Speargun Target Material

If you are using a friends pool or even sneaking into a nearby hotel at midnight, i find that its perfectly fine to use an actual fish. It really gives you a good idea of just how well the spear impacts on a real world level. Most of the time there isnt much left to clean up so its kind of a win win....be sure to post photos!!!
IG @kw.tony
kwtony is offline   Reply With Quote
Old 01-17-2017, 04:06 PM   #4
Registered User
CuzzA's Avatar
Join Date: Aug 2015
Location: Palm Harbor, FL
Posts: 940
Re: Speargun Target Material

Get a 13 gallon garbage can, draw a target on it and weight it down with some lead. Roll up some strips of old carpet and stuff it in the can.

You may or may not want to remove the flopper though as the shaft could get stuck.
CuzzA is offline   Reply With Quote
Old 01-17-2017, 04:31 PM   #5
Registered User
freediver4life's Avatar
Join Date: Jul 2011
Age: 49
Posts: 10
Re: Speargun Target Material

Duct tape couple of old boogie boards together 👍
freediver4life is offline   Reply With Quote
Old 01-17-2017, 05:19 PM   #6
FII Professional
deanmc's Avatar
Join Date: Sep 2012
Location: Rocky Point, NY
Posts: 332
Re: Speargun Target Material

I use Kickboards that you can buy at a local pool supply store. Only takes about 10lbs of lead to hold one underwater.
deanmc is offline   Reply With Quote
Old 01-25-2017, 01:35 AM   #7
Registered User
Join Date: Nov 2016
Posts: 52
Re: Speargun Target Material

Kickboards single or doublel, I tape my flopper once my shots are dialed in I untape it
Blue2u is offline   Reply With Quote
Old 01-25-2017, 03:37 AM   #8
popgun pete
Registered User
popgun pete's Avatar
Join Date: Mar 2006
Posts: 3,928
Re: Speargun Target Material

Anybody try ballistic gel? I suppose the mass of a spear shaft might push right through it, but it can certainly stop a bullet with high velocity as it plows through the gel leaving a track. I have never handled the stuff and only seen it on TV whenever there is some discussion about high power weapons and what damage they can deliver to a human being or animal.
popgun pete is online now   Reply With Quote
Old 01-25-2017, 07:58 AM   #9
Mike Wilborn
Chuuken's Avatar
Join Date: Apr 2012
Location: Southeast, MI
Posts: 466
Re: Speargun Target Material

I have never handled Ballistic Gel, but I know there are plenty of "DIY" videos for making it on YouTube. Two things immediately come to mind:

1) How does Ballistic Gel hold up underwater?
It could be an interesting experiment. Or, it could be 10 pounds of ick on
a stick.

2) I would look to archery targets more than firearm targets.
When I took hunters safety (so long ago), they did a demonstration to get us to respect Bows. If you ever see a class of new hunters, it's pretty reliable that everyone gets all reverent and careful when the deer rifle comes out, but it's a more relaxed, casual feeling when it's a bow.
The demo is just shooting a sandbag. you put a half dollar sized dot on a sandbag so you have something to shoot at, then you shoot it with a 30-06 or whatever. The sand stops the bullet. our bag couldn't have been more than 4" thick, bullet stays in bag. Then you shoot it with a broadhead. The arrow reliably gets stuck by its fletching as it pins the sandbag to whatever is behind it. Simple machines are scary.

so, all that anecdote is to say; I'd try to sink an archery target. Imagine shooting at a foam deer underwater.
Chuuken is offline   Reply With Quote
Old 01-25-2017, 08:23 AM   #10
Registered User
spearq8's Avatar
Join Date: May 2009
Posts: 3,246
Re: Speargun Target Material

For simple accuracy testing you can just use 5cm XPS construction foam ... it holds up pretty good to repeated testing. As for penetration testing, I used an actual large King Mackerel and sacrificed it for the sake of science and used it to see what it would take to penetrate that fish with a spine shot. I conservatively came up with 2 x 5cm of 38kg/m3 XPS styroboard. I increased that to 15cm for Tuna test ... but never did actually put a tuna in the pool this time. The King Mackerel was much easier to penetrate than the 10cm of foam and probably equivalent foam is about 7cm ... but it is good to err on the conservative side. It is incredible how accurate and repeatable this penetration test is and I used it to really push the performance envelope of regular spearguns. If you have good accuracy and good penetration ... you have a good gun ... it is as simple as that.
spearq8 is offline   Reply With Quote
Old 01-25-2017, 08:44 AM   #11
Registered User
Behslayer's Avatar
Join Date: Aug 2008
Location: Big Island
Posts: 5,096
Re: Speargun Target Material

Hi Taylor, I use either a Reel or a 1-2lb weight attached to a breakaway to make sure things don't go too far. For Target material, the most ideal is to have a Sled which holds your foam rigidly like a Frame. This is much easier to puncture than free floating foam, but gives good consistency. But the reality is that most people don't have a purpose built Metal Sled with 100lbs of weight on it. You can get Insulation Foam panels in different thickness and different density at Home Depot. But keep in mind how much weight that will need to be submerged. I've made up some really nice targets in the past only to learn I had no where's near the right amount of weight to sink them. In the end, the simplest is to take some of those foam floor tiles which you can find in most box stores https://www.walmart.com/ip/Norsk-Sto...-Pack/13253269. Bring a few weight belts of weight and some string so you can tye off to either side and have the target face you. You can use 2,3,4 if you have enough weight. 2 panels works fine. A target supported in this way has some give and will be much harder to penetrate than a rigidly held foam panel and takes a LOT less weight to sink. It kind of grabs the spear as it moves. but will give you fairly consistent results.
Behslayer is offline   Reply With Quote
Old 01-25-2017, 03:26 PM   #12
popgun pete
Registered User
popgun pete's Avatar
Join Date: Mar 2006
Posts: 3,928
Re: Speargun Target Material

It may be possible to build a composite sandwich of foam blocks of construction material interleaved with sheets of thin gauge alloy and mount the sandwich in a metal frame. The frame can be disassembled to change sheets and check hole locations in the metal sheet and how many sheets were penetrated. An accuracy target can be a mesh grid of flexible material in the style of netting, the shooting line indicating which hole the spear has passed through.

When my colleague Sergiy was testing his guns he used large plastic containers such as bulk oil bottles filled with sand. The only problem was the wet sand was brushed aside and the spears flew nearly right through a stack of sand filled bottles! But then they were being driven by over 1,500 psi of pressure, and maybe even more on occasion!
Attached Thumbnails
Click image for larger version

Name:	PlasticContainer4.jpg
Views:	135
Size:	18.5 KB
ID:	231144   Click image for larger version

Name:	PlasticContainer8.jpg
Views:	147
Size:	20.4 KB
ID:	231145  

Last edited by popgun pete; 01-25-2017 at 04:51 PM.
popgun pete is online now   Reply With Quote
Old 01-25-2017, 04:38 PM   #13
Matt Hudson
Registered User
Matt Hudson's Avatar
Join Date: Oct 2013
Location: Delray
Posts: 115
Re: Speargun Target Material

Yoga mat
Matt Hudson is offline   Reply With Quote
Old 02-01-2017, 02:11 AM   #14
Mike N
Registered User
Mike N's Avatar
Join Date: Jan 2009
Location: Sacramento
Posts: 950
Re: Speargun Target Material

I like to use plastic water bottles weighed down with lead and line. There isn't enough resistance to prevent the shaft from flying thru, but it is reusable until you penetrate the high spot and let out all the air.

Never let a good crisis go to waste.


Mike N is offline   Reply With Quote


Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

All times are GMT -5. The time now is 12:41 AM.

The World's Largest Spearfishing Diving Social Media Forum Powered by vBulletin® Version 3.8.1
Copyright ©2000 - 2022, Jelsoft Enterprises Ltd.
Copyright ©2002 - 2014 Spearboard.com