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I have four Faber LP 95s and 4 AL 80s. I used to dive twin 72s. I switched to twin 80s and thought that setup sucked and then tried the single 95. On cave fill they are over 120. You don't give up much to the HP 100 even if you can't get the over fill. The 95 works for me. Most of my dives are...

Lol, that was funny. I was like, wow, I might make a whole$3.00 an hour with those great ideas!

My only recommendation is on a computer and Nitrox, and that depends on how quickly you want to plunge back in. You can dive conservative and use the updated Navy tables and air. But I would recommend that you take a checkout dive combined with a Nitrox course at a LDS. You can rent a computer...

I have 2 MK25s, one has a S600 and the other has an X650. They breath effortlessly. I started with a MK V/109R and used it for almost 40 years. I am currently looking for some 109s in good shape to make them primaries. They reduce dry mouth considerably over the plastic ones. Plus they can use...

Guys, Dave has come up with a sound hydrodynamic technology for diver propulsion which in my personal tests Dave's fins out performs all the fins I have used, which is quite a few sets over 40 years. Every year new fins come out, but with no real measurable improvement or change in technology...

I found a description by someone who used a Seaway on a tuna. historian Jun '09 This is funny! I used this round and device in Tuamotu Ilds, Tahiti, september 1978! By the way, a guy from some Jap TV channel wanted a demo and we took him with us in the boat, but, instead of sharks, we did...

This is 7.62 powerhead video.

LOL! The .50 would do a far better job as far a PHs go, but the Seaway is the solution. I would agree that shot placement is important with current PHs, but In my case I was lucky to just hit the shark, you don't have time to carefully aim! I have looked for other videos without much luck...

You are right about that, except that powerheads don't produce the same amount of gas as a full length rifle barrel. Take a look at the .357 fail video. The fish was still alive 3 weeks later. The .357 Magnum is considered a very powerful handgun cartridge and its ballistic performance is makes...

I will leave this video here . It is a diver shooting large fish with a .357 powerhead.

It's not the Bangstick it's the fact that projectile has no drag on it and is not contained in a breech/barrel long enough to burn the gunpowder and create a larger volume of gas. Also everyone is under the misconception that a powerful rifle cartridge (by conventional hunting/defense standards)...

This shows a the 7.62x39, it makes a more gas. Plus this guy explains a few things well.

This video is of a .223 rifle fired under water. Even with the full length barrel there is not a lot of gas generated. This is a high speed video.

Here is a second shot.

This is a video of what looks like a .223 powerhead fired at a plastic jug. I'm not impressed.

I found this video and this is similar to my experience, this shark is not that big either. Shot with a powerhead twice.

They have become aggressive here, I don't think it will be hard to find one. I will have to break down and buy a go pro finally.

I like the pull pin idea. A blocking pin would put holes on either side of the case after you pull the pin and then the cartridge plunges past the holes to strike the firing pin. After thinking about the plastic clip, it functions because the 30-30 case has a rim. The .308 case doesn't have a...

I sent the drawings to my friend who has a CNC machine and I am looking at case capacities and dimensions. Will let you know when I have one in my hands to test. I may decide to make component kits for self assembly of the ammo down the road and the plastic safety clip if this works as expected...

Sharks react to injury just as we do usually. I was spearfishing and had been on the bottom for about 10 minutes and hadn't shot anything when I had an encounter with a psycho bull shark. I used my 5.56mm powerhead on him and he swam off, but he came back for more less than 30 seconds later, I...