Evanix Tactical Sniper

[dogwood]

sorry rkr that last post was  a bit misleading - the group picture was with the barrel tight and me trying to shoot it "loose"

here is the group from the free floating barrel


the 2 bottom holes are the first and fourth shot, the third is the highest

as you can see the side to side movement is very small but the vertical moving is great, which leads me to believe a free floating barrel will help.
Once I get my pump back up and working I'll try a few more things to try and narrow it down and verify.

still leaves me with what looks to be a valve issue.  Might order some peek and make a new seal, can't hurt, but I think part of the issue is the valve outlet cutting into the o-ring groove.

update - place an order at mcmasters for some springs and a peek rod

[rkr]

I assume that you have checked that all the pieces in your scope mounts are tight. The shot string doesn't explain that 3" up and down movement. I also doubt that free floating the barrel would do that, although you could stuff one big o-ring in between the band and the barrel to make it semi-floating and see what happens.

BTW, after being a pump guy for 5 years I finally gave up and got tanks with my 9mm Blizzard. It just takes way too long to fill one up when you let the pump cool down and all that trouble for just 5-10 shots.

[nappyman]

I believe Manny is right about hold technic with big bores, why, because I also had a problem just like you. Rounds all over, then would group a clip or so then all over again just like your pics.

What I found out in the end on my Windy City was it was suffering from excessive barrel vibration most likely because I had it putting out 127fpe which is hard to do vs a rainstorm . What I did was: 1. Make sure barrel/bottle band was not putting any pressure on barrel and tight screws carefully . 2. Put thin low recoil rubber between bottle and shroud. 3. Placed two o-rings on barrel between it and shroud. 4. Made sure to rest riffle at its balance point or held at its balance point on bags with butt planted in shoulder. From there it started making one big ragged hole at 50y.

Must say, befor I came to a understanding of what was going on, I went thru 600 JSB, sent the hawk scope back for warranty work (nothing) wrong with it order a leapers, bugged W. Piatt and cried the blues . Everything's fine now, so hopefully one of those things will help you just remember in ways hold technic on big bores is just plain different from little bores good luck.

[wwonka]

...most likely because I had it putting out 127fpe which is hard to do vs a rainstorm

Just for more info for us tuning-interested guys, do you mind explaining the details, and your own experience - what was hard about getting 127 FPE out of your .357 Windy City?  What specifically did you try, and where/how was it hard to do?

I thought that the Windy could hit 127 FPE pretty easily. In fact, Aussie was tuning his Windy down to try and get around that level - so I'm really interested to hear what your experience was.

[nappyman]

Was not hard for me my exhaust port was opened up a little. Some gun just naturally come high strong. The rain storm has a straight line to valve where the bottle guns have the 90 angle it goes thru so it makes harder to get fpe. For me just cranked hammer screw in 1/4 at a time and try different fill pressure. Now don't get me wrong I could most likely crank it all the way down and get 130-140 but it would waist so much air I get two full clips now

[dogwood]

I assume that you have checked that all the pieces in your scope mounts are tight. The shot string doesn't explain that 3" up and down movement. I also doubt that free floating the barrel would do that, although you could stuff one big o-ring in between the band and the barrel to make it semi-floating and see what happens.

BTW, after being a pump guy for 5 years I finally gave up and got tanks with my 9mm Blizzard. It just takes way too long to fill one up when you let the pump cool down and all that trouble for just 5-10 shots.

You're rittght about the shot string, I was expecting a lot more variation than I got.
We're thinking along the same lines, I replaced the muzzle piece that fit snugly in the shroud with a couple of o-ring
I had the pump working for a little bit last night, harbor freight orings are probably the issue now, got some coming from McMasters
I'm a desk jockey, I need all the exercise I can get and I hate the gym, plus I can use it as leverage on the CFO when I want more guns 

[dogwood]

I believe Manny is right about hold technic with big bores, why, because I also had a problem just like you. Rounds all over, then would group a clip or so then all over again just like your pics.

What I found out in the end on my Windy City was it was suffering from excessive barrel vibration most likely because I had it putting out 127fpe which is hard to do vs a rainstorm . What I did was: 1. Make sure barrel/bottle band was not putting any pressure on barrel and tight screws carefully . 2. Put thin low recoil rubber between bottle and shroud. 3. Placed two o-rings on barrel between it and shroud. 4. Made sure to rest riffle at its balance point or held at its balance point on bags with butt planted in shoulder. From there it started making one big ragged hole at 50y.

Must say, befor I came to a understanding of what was going on, I went thru 600 JSB, sent the hawk scope back for warranty work (nothing) wrong with it order a leapers, bugged W. Piatt and cried the blues . Everything's fine now, so hopefully one of those things will help you just remember in ways hold technic on big bores is just plain different from little bores good luck.

Not ruling it out, I'm sure it is a factor, the issue I think with this gun (or part anyway) is the barrel is fixed too well, it is solid with the shroud and the shroud is fixed by the barrel band and the forearm piece used the shroud to hold its self in place

There are multiple issues at play here and no one simple solution

[Nomadic Pirate]

All of my Rainstorms have a solid Barrel to everything else fixed, no free nothing just solid.

My Sumatras, Sam Yangs and Careers where solid barrel fixed to air reservoir and breech, no free floating nothing.


All guns superbly accurate

[nappyman]

Not saying what I did will work for everyone just seam to settle my barrel. As far as Aussie he had one of the first batch I believe in the WC so quality control might have been better, you know portholes alined properly. Also with him using air and tempture over there, altitude , yada yada yada. Will increase or decrease your fpe.  Also noticed I was clipping shroud end and baffles I opened end cap by a 1/16 ditched the baffles and now sport a Neal C. Which for me makes it shoot a hair better. Sorry for kind of jumping around but am at lunch and juggling sawn itch and chips

[dogwood]

All of my Rainstorms have a solid Barrel to everything else fixed, no free nothing just solid.

My Sumatras, Sam Yangs and Careers where solid barrel fixed to air reservoir and breech, no free floating nothing.


All guns superbly accurate

and my .22 marauder is free floating and I can shoot a rock chuck in the eye at 50 yards, what's your point?
I can stack pellets at 25 yards with my Gamo springer, again what's your point?
you've never had a valve stem break, yet I have, again what's your point?

your guns don't use the pressure vessel and shroud to hold your stock in place either, this one does. Is that a factor? I don't know yet.

I'm looking for answers to problems and harping like a fan boy isn't doing anyone any good

I'm not saying the way the gun is being held isn't a problem, but I saying it sin't the only problem

if you'd looks at those strings you'd see that the velocity has changed with no setting changes. and guess what? consistence is the heart of accuracy, whether it be how you hold it or how the valve opens to how the barrel vibrates.

I'm glad your guns work great and are accurate, still doesn't do ME any good.

oh and my shooting buddy has a 3D in 357 and we aren't seeing any of the issue I'm having with mine

[Nomadic Pirate]

Yeah and the 3Ds have the stock holding the shroud and barrel all together too, and both mine are fine,
Jim Chapman's video of the tactical sniper shows normal evanix Standard grouping.

Maybe you should have shot the gun for a few 100s of rounds before starting to mess with it, that way you would have known if you got a lemon, ( which can happen with all brands ) now you'll never know if she was or you just messed the gun up somehow,.....now you'll never know.

[dogwood]

the only thing I did before the valve broke was mod the shroud - and I did shoot several hundred rounds through it. so yes a lemon - it happens 

but you're right I should have waited to mod the shroud so could have sent it back - but now I own it and I'm trying to fix it. 

But when I spend that much on a gun I don't expect that to be the case- its called Quality control...
 
I'm looking for ideas and suggestions and some are doing just that.......... 

[Nomadic Pirate]

If the accuracy was that bad you should have sent the gun back immediatly.

[dogwood]

they won't take anything back that has been damaged - i.e. what I had to do to get the shroud extension mounted.

and I was hopping that the accuracy would improve as it broke in, which is the case for many air guns.

I needed to make it backyard friendly so I could shoot it........

[C.ALLS]

they won't take anything back that has been damaged - i.e. what I had to do to get the shroud extension mounted.

and I was hopping that the accuracy would improve as it broke in, which is the case for many air guns.

I needed to make it backyard friendly so I could shoot it........

Have you tried contacting Evanix? I sent them a few emails and they are sending me a new barrel(due to port alignment issues) once they get the export license they must apply for before shipment. The guy/girl was very helpful and assured me that all guns were tested for accuracy before leaving the factory. The problem is they only test the .357 for accuracy at 18 meters which to me isn't much of a test at all. Of course this has been a week or more ago and I haven't gotten any shipping conformation emails so they may just be blowing smoke up my a**. Guess I'll find out soon enough.

As far as accuracy my groups looked similar to yours but after learning how to shoot the gun (my first big bore) for a while and refilling every 3-5 shots, as well as correcting a few shroud/barrel alignment issues my 50 yard groups (3 shots) can now be covered with a quarter. Now after Will gets his hands on it I should be set for 7+ shots.

[dogwood]

I did and them an email about 4 days ago, haven't gotten reply- that is very encouraging that they are willing to send you a new barrel, hopefully it get through to you soon

and your right 18m isn't much of a test, at the range (hair under 20 yard) I can shoot one largish ragged hole

glad to hear you're getting it straighten out, hopefully once I get my pump rebuilt I can get back at it and get rid of some of the variables.

I'm starting to think it might have something to do with the forearm stock arrangement, going to try shooting it with it resting on the receiver and not the forearm - see if that changes the dynamics at all.

after my last chrony session I realized my tune had changed, need to back it off again and see ....

[Nomadic Pirate]

I'll say this again,

Sumatras, Sam Yangs and Carreres have the barrel stuck to the airtube and they are suberbly accurate,
other videos of Sniper Tactical show good accuracy, I think you are just chasing ghosts

[rkr]

Was not hard for me my exhaust port was opened up a little. Some gun just naturally come high strong. The rain storm has a straight line to valve where the bottle guns have the 90 angle it goes thru so it makes harder to get fpe. For me just cranked hammer screw in 1/4 at a time and try different fill pressure. Now don't get me wrong I could most likely crank it all the way down and get 130-140 but it would waist so much air I get two full clips now

I get two magazines from my tube gun and I'm not done yet. Although getting 3 magazines at good power level is probably out of reach. What's your fps spread for two mags?

[rkr]

All of my Rainstorms have a solid Barrel to everything else fixed, no free nothing just solid.

My Sumatras, Sam Yangs and Careers where solid barrel fixed to air reservoir and breech, no free floating nothing.


All guns superbly accurate

There are two o-rings, one holding the shroud against the barrel and another holding the shroud against the band. I wouldn't call that solid.

[rkr]

I'll say this again,

Sumatras, Sam Yangs and Carreres have the barrel stuck to the airtube and they are suberbly accurate,
other videos of Sniper Tactical show good accuracy, I think you are just chasing ghosts

Not very valid point as they have double airtubes making the structure much more rigid. Shooting with support on the receiver is agood idea as it will eliminate a lot of things like standing wave vibrations in the airtube. Your gun does ping quite a lot doesn't it?