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#31
June 8th, 2006
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ok I was looking at it last night...I can load both guns in about the same amount of time. with the air gun the extra wrap of line takes about the same amount of time as it does to pull the band back on my band gun. (the extra wrap of line coming from the fact that the shooting line is not on the back of the spear as it is on a euro gun. air gun: fire, load wrap twice band gun: fire, load, loop the single wrap around the line release, pull band. Still personal preference I guess. And again w/ the euro gun being quieter the school of fish doesn't go anywhere and I am able to take several before they more on. Having both I'll still take my chances w/ a euro. 
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#32
June 8th, 2006
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Dont get me wrong, i like band guns. I have a 55" Wong hybrid and lots of old jbls i dont use. Last edited by GreekDiver; June 8th, 2006 at 15:23.
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#33
June 8th, 2006
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The mamba system not only increases the guns power but makes it a lot smoother & quieter. My mamba is pumped up to the max & it definitely outperforms my 110 single rubber powered gun, I would say it is also quieter. Not sure about the speed of loading but I dont find the mamba is any more difficult to load. When firing a 100cm 6.5 spear from the mamba, if you look down the side of the barrel, you can really see the speed & flat trajectory of the spear. Amazing
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"DeeperBlue.net Staff Member & Team Leader" db shop become a db supporter db home page dry barrel air guns Hall of Fame Last edited by foxfish; April 23rd, 2008 at 19:31.
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#34
June 8th, 2006
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You are right one the advantages of the mamba is that you can reduce the amount of pressure needed to obtain the same output, but let me tell yopu that nobody uses that way. Everubody load it with more pressure to obtain a faster shaft and more range. The piston and shock absober piece inside the muzzle are made of a high quality material so let you use higher pressures. Other important thing is that the Mamba kit can be installed in most of the comercial pneumatic guns in the market, but it is worth in spearguns of 90 cms and up. Regarding the video the comparation, you are right maybe a same lenght gun would be better, but remember that you also need to compare guns with different piston diameters. Mares Cyranos and Sporas Stealths have 11 mm internal barrels and can use only 7 mmm shaft or less. But old mares Sten, Seac Assos, Cressi Sl's amomg others use 13 mm diameter internal barrel so they can use 8 mm or less. The difference in using 11 mm or 13 mm guns with 7 mm shafts is huge. The area of the piston in the 13 mm model is bigger and it is more efective. So even if they have the same lenght the 13 mm gun with 7 mm will need much less pressure to have the same output that the other gun, or it is able to work at bigger pressure. Of course in this example the loading effort is different too. Cheers Ivan PD: Greekdiver we use extensors to load the big guns in order to reach the tip of the shaft
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www.freediveforlife.com
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#35
June 8th, 2006
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Asturven,
Do you have any pictures of the airguns you use? Id like to see your setup. Id like to buy a mamba kit for my cyrano. Where do you get them?
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#36
June 8th, 2006
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Great info! - so the larger piston diameter is better ? Good to know since I'd have thought the opposite! If I ever decide to get one of these I'll be sure and check with you about brands and all other details. Do the mambas have to be loaded out of the water?
Here is a link to the penetration test video. http://photos.imageevent.com/blueroo...netrazione.mpg
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www.michiganfreediving.com
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#37
June 8th, 2006
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w/ that setup I'm sure its much faster to reload. Do you ever have a problem w/ the line wraping up around anything while hunting?
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#38
June 8th, 2006
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No, the mambas do not need to be loaded outside of the water. You load it just like a regular pneumatic, you only have a previous step to put a slide ring with a O-Ring on it into de muzzle and that is.
I also have a video of the loading, if you want. Greek Diver, I use my guns with reels and some attached directly to the float like a hawaiian Breakaway.
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www.freediveforlife.com
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#39
June 8th, 2006
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#40
June 9th, 2006
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Hi guys, I've joined this discussion late but like foxfish I just received my new Asso 90 last week after years of using band guns and had similar experiences foxfish had the first time I used it.
I bought the gun with the expectation of converting it to a mamba after reading all about it on the European forums. My main interest in it is, number one, it loads fast, two, the power, number three, the maneuverability. I want to use it in Northern California where the visibility is not very good and I need a gun to hunt in caves and this is did for me well enough the first time I used it. But, the gun is sufficiently different from the guns I used in the past that will take me some time to adjust. The first shot I attempted to take the gun did not fire, it was due to the safety (the guns I make have none so.....) by the time I figured it out I missed a 15 pound lingcod from point blank. On the second shot, the gun didn't fire again but the safety was not the problem, I think the line release was too tight. Another fat ling lost. The third shot, the gun worked perfectly, ling on the stringer. Fourth shot, same thing. Bottom line, the gun has a place in my arsenal, it will never replace my band guns for clear open water but in the right place and time it will be my gun of choice. So patience and practice is recommended for all interested. Steve
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#41
June 9th, 2006
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Although the power potential of a 13mm piston is greater, so too is the loading effort, you cant get out more than you put in!cheers dave www.spearo.co.uk
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#42
June 9th, 2006
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Steve,
One of the thing that I do as soon as I have a new pneumatic is to remove the safety for all of my guns, that way you never will have the same problem again. The other one is change the original shaft. There are some tricks to improve the performance of the gun without putting a Mamba but you need to open the gun and make a little work inside and change the oil. Regarding the line releasing problem, I saw in the pictures that you do not use a reel, well put a little rubber bungee in the muzzle and then attach the mono there, this will mantain the rigth pressure in the line when the gun is loaded and you will not have more problems. Do you have an idea of what pressure are inside your gun? That will be really useful if you have plans to upgrade the gun with a Mamba kit, That way you will be able to compare the pereformance at the same pressure. I understand that you will not change the bands guns for clear water, because you have excellent bandguns. Who made this guns for you? jejejeje Cheers Ivan
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#43
June 9th, 2006
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Dave,
Your are right, but I will pay that price any day. I used my longer guns at 30 Bars and they shoot really nice. Cheers Ivan
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www.freediveforlife.com
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#44
June 9th, 2006
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I'm interested in the changes to the shaft and oil you mentioned could you give me more info? The final modification I'm planning for the gun is the Mamba kit but this will have to wait until the fall. The gun came filled to 25 bar from the factory and I pumped it 30 more times before I used it. Like I said the gun just arrived and the weather was right so I jumped in with it, normally I would have preferred to take some target practice in a pool first but not bad for first time out. Regarding my band guns, thanks for the compliment and I can make one for you if you like. Steve PS could you sen me the loading video on the Mamba?
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#45
June 9th, 2006
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Here is the loading video if you haven't seen it yet
http://www.team5150.com/~harry/loadi...el%20Mamba.avi
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