Airgun Technologies Uragan 2 177 vs vulcan 3 177

[BBGunn]

Yes, but just backing the adjustment way off has been sufficient for all my guns.

I am on the edge of starting to experiment with a light hammer spring, or shortened hammer spring. I have had my U2 for almost 14-months and have had to disassemble the rifle 5-times to repair one thing or another with the valve poppet. The latest was just 2-days ago.

The first poppet body broke in half and was the V2 version which broke in all the early U2 rifles. I got the V3 version poppet and while it doesn't break, the o-ring that sits up against the shoulder of the poppet breaks/splits! I run the reg. at 145bar and the hammer spring in the stock setting with the adjuster plug flush with the back of the block.

So, running the hammer spring as 'soft' as possible has not worked for my rifle.

On the plus side..., I have gotten very efficient at taking the rifle apart and getting it back together quickly.

 

[Vetmx]

My .30 U2 is set at 150b. My hammer spring adjuster is sticking out the back of the block and it’s adjusted perfectly. I determine when my spring is adjusted properly by checking my first shot after 24 hours. If it’s a squib, then it’s not enough. If the first shot is hot, then it’s too much. Setting the HS with a balance valve is not a one day thing. Most if not almost all guys with these guns are just smashing the sh#t out of their valves for no reason. When I see yep, I just adjust my reg and never touch the spring I think ok, scratch that gun off the buy it used list.

 

[Vetmx]

Gotcha, well I got a V3 .177 that's getting a buttload of shots. I think I will still end up buying the U2 600mm .177. I managed to sell the U2 .22 700mm. The V3 is doing very well with pellets atm, I just gotta find the time to tune it for better consistency.

You are not tuning for efficiency with a balance valve by playing with the spring. Though it may help a little but nothing like a poppet gun. You are just adjusting it so you don’t kick the crap out of the valve and eliminate some of the annoying sounds going on next to your ear.

 

[JaceSpace1369]

You are not tuning for efficiency with a balance valve by playing with the spring. Though it may help a little but nothing like a poppet gun. You are just adjusting it so you don’t kick the crap out of the valve and eliminate some of the annoying sounds going on next to your ear.

Well the V3 doesn't have a balanced valve. I did minutes to tune the U2 .22 700mm via balanced valve and got a much lower spread, from 20-25fps spread to 5fps right before selling it.

 

[BBGunn]

My .30 U2 is set at 150b. My hammer spring adjuster is sticking out the back of the block and it’s adjusted perfectly. I determine when my spring is adjusted properly by checking my first shot after 24 hours. If it’s a squib, then it’s not enough. If the first shot is hot, then it’s too much. Setting the HS with a balance valve is not a one day thing. Most if not almost all guys with these guns are just smashing the sh#t out of their valves for no reason. When I see yep, I just adjust my reg and never touch the spring I think ok, scratch that gun off the buy it used list.

So, if I'm reading what you wrote here correctly, you are saying that you have adjusted your hammer spring adjuster farther out (less tension) than the factory setting (flush with block). Is that correct? To be honest, I never tried turning the adjuster plug further 'out' than flush with the block because I assumed the rear block would not fit back into the stock unless the adjuster plug was flush.

If I can turn the adjuster plug further out than the factory setting and still get the stock on then that would give me the same affect as shortening the spring. and may solve my issue of the hammer smashing the poppet body into the valve body and crushing that o-ring.

Bye the way, I assume from your forum name that you are a motocross racer??? I raced for about a decade from early 70s to early 80s. My last race bike was a Maico 400.

 

[Vetmx]

So, if I'm reading what you wrote here correctly, you are saying that you have adjusted your hammer spring adjuster farther out (less tension) than the factory setting (flush with block). Is that correct? To be honest, I never tried turning the adjuster plug further 'out' than flush with the block because I assumed the rear block would not fit back into the stock unless the adjuster plug was flush.

If I can turn the adjuster plug further out than the factory setting and still get the stock on then that would give me the same affect as shortening the spring. and may solve my issue of the hammer smashing the poppet body into the valve body and crushing that o-ring.

Bye the way, I assume from your forum name that you are a motocross racer??? I raced for about a decade from early 70s to early 80s. My last race bike was a Maico 400.

I had to modify my stock to accommodate the adjuster sticking out on all three of my U2’s. If I couldn’t get the results I was looking for and ran out of adjustment, then I would have clipped the spring. But clipping springs on a gun that you just can’t call the manufacturer for a new one is a risky endeavor.

 

[BBGunn]

I had to modify my stock to accommodate the adjuster sticking out on all three of my U2’s. If I couldn’t get the results I was looking for and ran out of adjustment, then I would have clipped the spring. But clipping springs on a gun that you just can’t call the manufacturer for a new one is a risky endeavor.

After I replied to you earlier I went and pulled the stock on my rifle. I turned the adjuster plug two full turns further out. My rifle has the carbon stock. I looked down into the stock and could see there is plenty of room for the spring adjuster to stick-out beyond flush. I put the stock back on with no issues. I may have the room to turn the adjuster out several turns more before contact with the inside of the stock becomes an issue.

At any rate, I'll start test firing over the Chrony in a couple days and see where the rifle is at.

Thank you for the info. regarding the further adjustment range available for the U2. Can't believe I didn't think to look into the stock and see if there was room for more outward adjustment on that adjuster plug. I'm feeling dumb as a 'box of rocks'!

I use to work in the machine shop for Preston Petty. Do you remember, Preston Petty Products?

 

[Vetmx]

After I replied to you earlier I went and pulled the stock on my rifle. I turned the adjuster plug two full turns further out. My rifle has the carbon stock. I looked down into the stock and could see there is plenty of room for the spring adjuster to stick-out beyond flush. I put the stock back on with no issues. I may have the room to turn the adjuster out several turns more before contact with the inside of the stock becomes an issue.

At any rate, I'll start test firing over the Chrony in a couple days and see where the rifle is at.

Thank you for the info. regarding the further adjustment range available for the U2. Can't believe I didn't think to look into the stock and see if there was room for more outward adjustment on that adjuster plug. I'm feeling dumb as a 'box of rocks'!

I use to work in the machine shop for Preston Petty. Do you remember, Preston Petty Products?

Certainly do. I didn’t have to modify my carbon stock either. At least I don’t think I did. Too many guns. What’s interesting is my .30 at 150b with a 700mm barrel has the spring backed off the most. My compacts at 130ish and 160ish are backed out but not as much as the big boy.

 

[Jrivcas]

He sintonizado ambos.

En In your opinion which is the better option V3 or U2

 

[JaceSpace1369]

En In your opinion which is the better option V3 or U2

i attempted to buy a vulcan 3 .177, Krale instead sent me a V3 .30 which I had for a while and then sold. They accidentally send to me the V3 177, i had it for about two days and I enjoyed it a lot and sent it back. I then bought a U2 600mm .177 and I love it. I am currently shooting 16gr slugs at 970fps very accurately. And still get over 70 shots from 300b to 140b. It is severely oversprung as @Vetmx has stated, and I too had to carve into the stock to fit the
hammer adjuster. But it still shoots really well and my ES is tighter.

I did get extra spring from AGT to experiment, but at this time I want to leave it where it's at. We'll see when I change my mind though. I would love for the ping to gi down even further but I need someone to make me a hammer made from peek.

 

[zx10wall]

En In your opinion which is the better option V3 or U2

I’d get the .177 U2 or U3 in 600mm for a great slugger!

 

[Jrivcas]

¡Yo compraría el .177 U2 o U3 en 600 mm para un gran bateador!

 

[Jrivcas]

And in caliber 5.5? Which one

 

[zx10wall]

And in caliber 5.5? Which one

Vulcan .22 - 700 (easy power!) would be my first choice but the Uragán is good too.

 

[Jrivcas]

Tienes una venta en Texas, te envié un correo electrónico.

 

[Strelac]

After I replied to you earlier I went and pulled the stock on my rifle. I turned the adjuster plug two full turns further out. My rifle has the carbon stock. I looked down into the stock and could see there is plenty of room for the spring adjuster to stick-out beyond flush. I put the stock back on with no issues. I may have the room to turn the adjuster out several turns more before contact with the inside of the stock becomes an issue.

At any rate, I'll start test firing over the Chrony in a couple days and see where the rifle is at.

Thank you for the info. regarding the further adjustment range available for the U2. Can't believe I didn't think to look into the stock and see if there was room for more outward adjustment on that adjuster plug. I'm feeling dumb as a 'box of rocks'!

I use to work in the machine shop for Preston Petty. Do you remember, Preston Petty Products?

Have you tried turning HS screw CCW on your U2?
If yes, do you mind to share your thoughts about it?
Here’s what I found out about it and I posted it in another thread; my results speak for themselves:

https://www.airgunnation.com/threads/uragan-2-things-ive-noticed.1327734/post-1940084