Disco SSG thread

[mobilemail]

Well I guess its time I posted my SSG setup and build results.....

its a basic "cartridge" type design....  there was no mods to the hammer and only changes was done to the rear cap and it was drilled and tapped to 1/2-20 so that it would completely clear the stock disco springs so that any spring changes or adjustments could be made without taking the gun apart..

the important bits... bout as simple as it gets... guiderod front and rear spring guides stop collar and preload adjustment nut... and then the rear gap set and locking nut...



here it is with everything installed in the gun



uncocked



Cocked



While its not a true "fully internal" setup there is nothing exposed to bite hands.....

and here is the shot string...


And the Efficiency calculations


While I feel the efficiency is extremely good it wastes a LOT of air driving a 14.3 grain pellet to 26.4 FPE... with 18.1 and the same tune it gets 31 fpe and I pick up a few shots at the end of the string for even better eff (think it was in the 1.7fpe/cuin range) but I didn't make a chart of that shot string.... or if I would detune the 18.1's to 26 fpe I would imagine I could get probably another 10-12 shots or more and easily get into the 1.8fpe/cuin efficiency ball park... but that's neither here nor there as I shoot almost exclusively 14.3 cphp because they are cheap and plentiful and the gun shoots them well......

That is an outstanding result! That's as many shots as my regulated .22 Marauder, at the same power!  Is that a single or double tube disco, I can't tell from the picture.

[BigTinBoat]

And the Efficiency calculations

That is an outstanding result! That's as many shots as my regulated .22 Marauder, at the same power!  Is that a single or double tube disco, I can't tell from the picture.

Looks like a Double here

[lloyd-ss]

I'll jump in here, yes, Michael's gun is one of the original Disco Doubles that he won in the GTA raffle in the summer of 2012.  Looks like Michael not only talks a good game, but he can back it up, too.

BTW, Mark, are you the guy who won a plethora of raffle prizes at the Fun Shoot this past weekend?   
Lloyd

[mobilemail]

I'll jump in here, yes, Michael's gun is one of the original Disco Doubles that he won in the GTA raffle in the summer of 2012.  Looks like Michael not only talks a good game, but he can back it up, too.

BTW, Mark, are you the guy who won a plethora of raffle prizes at the Fun Shoot this past weekend?   
Lloyd

Guilty as charged!  In fairness, my wife won a couple of them and sent me up as her retriever!  (But the rifle is MINE!  ALL MINE!!!)

[lloyd-ss]

I'll jump in here, yes, Michael's gun is one of the original Disco Doubles that he won in the GTA raffle in the summer of 2012.  Looks like Michael not only talks a good game, but he can back it up, too.

BTW, Mark, are you the guy who won a plethora of raffle prizes at the Fun Shoot this past weekend?   
Lloyd

Guilty as charged!  In fairness, my wife won a couple of them and sent me up as her retriever!  (But the rifle is MINE!  ALL MINE!!!)

Ha, ha.  I think you and Jay were both guilty of stuffing the ballot boxes. But hey! It paid off!

[David Mccann]

Nice. Good job sir.

[mobilemail]

I'll jump in here, yes, Michael's gun is one of the original Disco Doubles that he won in the GTA raffle in the summer of 2012.  Looks like Michael not only talks a good game, but he can back it up, too.

BTW, Mark, are you the guy who won a plethora of raffle prizes at the Fun Shoot this past weekend?   
Lloyd

Guilty as charged!  In fairness, my wife won a couple of them and sent me up as her retriever!  (But the rifle is MINE!  ALL MINE!!!)

Ha, ha.  I think you and Jay were both guilty of stuffing the ballot boxes. But hey! It paid off!

Honestly, I didn't stuff anything, I put one ticket each in several boxes. The rest is by the grace of God.

[Buldawg76]

I'll jump in here, yes, Michael's gun is one of the original Disco Doubles that he won in the GTA raffle in the summer of 2012.  Looks like Michael not only talks a good game, but he can back it up, too.

BTW, Mark, are you the guy who won a plethora of raffle prizes at the Fun Shoot this past weekend?   
Lloyd

Guilty as charged!  In fairness, my wife won a couple of them and sent me up as her retriever!  (But the rifle is MINE!  ALL MINE!!!)

Ha, ha.  I think you and Jay were both guilty of stuffing the ballot boxes. But hey! It paid off!

Honestly, I didn't stuff anything, I put one ticket each in several boxes. The rest is by the grace of God.

It appears you were in his favor last weekend then .

Mike

[mobilemail]

That was my conclusion too! 

[MichaelM]

MichaelM
I like the design and am curious as to where the free play thumb adjuster and thumb nut are from as that looks very custom and like it was made for the gun. I already have my disco end cap drilled to the 3/8-24 that crosman use in the Prods and Mrods so going out to 1/2-20 would not be much of an issue.
Mike

It is indeed custom... machined it from delrin

Im going to finish my buddy Marks(mobilemail) this week and would like to know what wire diameters are you having the best luck with?

I BELIEVE its a .039 12 coil spring.... almost positive its the same spring that Rstern used to recommend for 2200 psi fills..... The valve is a cool custom setup that would be more at home in a bigbore setup then in the .22 lol it flows so well as a matter of fact that I have to use a tiny .120 transfer port to get such a nice shot string as anything bigger would make it WAY to peaky on the curve   

And yes it IS a disco double! IMHO its the best thing that can be done to a disco....

thanks for the kind words everyone... I know there is a lot more efficiency to be found with heavier pellets and could reach outstanding numbers if I wasn't such a cheap *** and would shoot 18.1's lol but what can I say... 6 bucks or so for a tin of cphp's and all i ever really shoot is 20 yards in the back yard and they work just fine

[Buldawg76]

MichaelM
I like the design and am curious as to where the free play thumb adjuster and thumb nut are from as that looks very custom and like it was made for the gun. I already have my disco end cap drilled to the 3/8-24 that crosman use in the Prods and Mrods so going out to 1/2-20 would not be much of an issue.
Mike

It is indeed custom... machined it from delrin

Im going to finish my buddy Marks(mobilemail) this week and would like to know what wire diameters are you having the best luck with?

I BELIEVE its a .039 12 coil spring.... almost positive its the same spring that Rstern used to recommend for 2200 psi fills..... The valve is a cool custom setup that would be more at home in a bigbore setup then in the .22 lol it flows so well as a matter of fact that I have to use a tiny .120 transfer port to get such a nice shot string as anything bigger would make it WAY to peaky on the curve   

And yes it IS a disco double! IMHO its the best thing that can be done to a disco....

thanks for the kind words everyone... I know there is a lot more efficiency to be found with heavier pellets and could reach outstanding numbers if I wasn't such a cheap *** and would shoot 18.1's lol but what can I say... 6 bucks or so for a tin of cphp's and all i ever really shoot is 20 yards in the back yard and they work just fine

All I can say is it looks like steel and I like the fact that it delrin even better since it less weight and much easier to machine and knurl as well. very nice indeed.

mike

[MichaelM]

All I can say is it looks like steel and I like the fact that it delrin even better since it less weight and much easier to machine and knurl as well. very nice indeed.

mike

Believe it or not I find delrin to be a pain in the butt to knurl nicely!!! While it machines so nice it even makes a hack like myself look like he knows what he is doing around a lathe... to get nice deep knurls its a pain and seems to take 4 times the pressure one would think to get it to take.... me thinks I need to make/buy a scissor type knurling holder instead of my straight push type.. but then again I like the  spiral look of using a single wheel sometimes too....

[Buldawg76]

All I can say is it looks like steel and I like the fact that it delrin even better since it less weight and much easier to machine and knurl as well. very nice indeed.

mike

Believe it or not I find delrin to be a pain in the butt to knurl nicely!!! While it machines so nice it even makes a hack like myself look like he knows what he is doing around a lathe... to get nice deep knurls its a pain and seems to take 4 times the pressure one would think to get it to take.... me thinks I need to make/buy a scissor type knurling holder instead of my straight push type.. but then again I like the  spiral look of using a single wheel sometimes too....

I can see where delrin would take more pressure to knurl since its more resilient in retaining its shape but you seem to have the process under control quite well IMO.

Mike

[degriz (AKA) Lou Hauburger]

Travis, Any info on the WAR SSG

[mobilemail]

I talked to Travis today about it. (Not to speak on his behalf.  )

He's been pretty buried keeping up with the FLEX orders, so he's had to take care of those customers before he wraps up this project.   It sounds like it's all done but just final testing.   And honestly, if I were one of the guys waiting for a FLEX, that's exactly what I would want him to be doing. (In fact, I hope to be one of those guys one day.)

[BigTinBoat]

I talked to Travis today about it. (Not to speak on his behalf.  )

He's been pretty buried keeping up with the FLEX orders, so he's had to take care of those customers before he wraps up this project.   It sounds like it's all done but just final testing.   And honestly, if I were one of the guys waiting for a FLEX, that's exactly what I would want him to be doing. (In fact, I hope to be one of those guys one day.)

Sorry guys - Travis is getting my Flex .25 shipped out today 

[mobilemail]

You don't look very sorry!!   

I'm still figuring out how to slip the cost past the wife detector...   

[BigTinBoat]

I'm still figuring out how to slip the cost past the wife detector...   

I bought mine 1 gun at a time. Over the past 2 years I picked up a bunch of different lower cost gun, tuned them, shot them and then over the past 2 weeks I sold a bunch of them. Basically a "savings plan" for the Flex. And now a bunch of different guys  have some nice guns.

[mobilemail]

I have news!  Travis called and sent me the shot string with the prototype SSG.  It was like talking to a kid, he was pretty excited. The rifle I sent him had a homemade power adjuster in it that had the rifle set to shoot about 20 shots at ~800fps, the SSG added another 50% to that.  My wife's bone stock disco only gets about a dozen shots per fill right now, so I can't wait to put one in her gun.

Travis also said it made the Disco quiet enough that you could possibly shoot it without an LDC. I would take that with a grain of salt with anyone else, but Travis really hates noisy rifles (there is a thread about that somewhere), so I believe it.

Price point is going to be $49.95 (I think he said that's the shipped price, but double check with Travis@ www.wickedairrifles.com)  If you're like me and you don't have the time, tools or talent to make your own, the gained efficiency (saved pump strokes or trips to the dive shop) makes it a no-brainer.

Here is the hard data:

The "before" shot string, as sent to Travis
785      815   798
792      814   789
802      814   780
795      815   771
804      815   755
806      815   
811      811   
804      806   
814      805   
812      795   
With Crosman 14.3gr pellet, 2000-1200psi  I made this shot string myself before I sent off the rifle

SSG shot string at same power (Travis provided this and the next one)
Created: 06/08/16 03:42 PM
 Description: SSG disco
Notes 1: 2k to 1.2k
 Notes 2: Distance to Chrono(FT): 1.00
Ballistic Coefficient: 1.000 Bullet Weight(gr): 14.30
Temp: N/A °F BP: N/A inHg Altitude: 0.00
 # FPS FT-LBS PF
33 782 19.42 11.18
32 786 19.62 11.24
31 801 20.38 11.45
30 796 20.12 11.38
29 788 19.72 11.27
28 794 20.02 11.35
27 804 20.53 11.50
26 812 20.94 11.61
25 808 20.73 11.55
24 806 20.63 11.53
23 809 20.78 11.57
22 816 21.15 11.67
21 802 20.43 11.47
20 808 20.73 11.55
19 800 20.33 11.44
18 813 20.99 11.63
17 813 20.99 11.63
16 806 20.63 11.53
15 806 20.63 11.53
14 798 20.22 11.41
13 798 20.22 11.41
12 801 20.38 11.45
11 814 21.04 11.64
10 812 20.94 11.61
9 802 20.43 11.47
8 795 20.07 11.37
7 792 19.92 11.33
6 806 20.63 11.53
5 792 19.92 11.33
4 791 19.87 11.31
3 797 20.17 11.40
2 789 19.77 11.28
1 780 19.32 11.15
Average: 800.5 FPS SD: 9.6 FPS
Min: 780 FPS Max: 816 FPS
Spread: 36 FPS Shot/sec: 0.1 True
MV: 801 FPS Group Size (in): 0.00

SSG Shot string with a little more power
Created: 06/08/16 11:12 AM
 Description: SSG disco
Notes 1: 14.3 Cp
Notes 2: Distance to Chrono(FT): 1.00
Ballistic Coefficient: 1.000
Bullet Weight(gr): 14.30
Temp: N/A °F BP: N/A inHg
Altitude: 0.00
# FPS FT-LBS PF
20 820 21.35 11.73
19 819 21.30 11.71
18 822 21.46 11.75
17 825 21.62 11.80
16 823 21.51 11.77
15 828 21.77 11.84
14 834 22.09 11.93
13 834 22.09 11.93
12 839 22.36 12.00
11 836 22.20 11.95
10 832 21.98 11.90
9 836 22.20 11.95
8 833 22.04 11.91
7 831 21.93 11.88
6 831 21.93 11.88
5 833 22.04 11.91
4 831 21.93 11.88
3 827 21.72 11.83
2 826 21.67 11.81
1 ERROR 10
Average: 829.5 FPS SD: 5.7 FPS
Min: 819 FPS Max: 839 FPS
Spread: 20 FPS Shot/sec: 0.1
True MV: 830 FPS Group Size (in): 0.00

Since my wife mostly shoots in the basement or back yard with me, I think I wll see if hers will tune down to 550-600fps. If it does I'll share my results with the install and adjustment.

[mobilemail]

Here are some pics Travis sent me of the SSG parts. He's going to add a plastic cap to the final product just to make it look nice and avoid any possibility of gotchas. (I don't think it reaches out far enough for a gotcha, but it will look cooler.)