Disco SSG thread

[Dairyboy]

Wow 40 shots with a 3.68% ES. So far your test 2 and 4 are very good.

[Airgun.Sniper]

 Werent you worried about velocity at a time?



 Cheers

 Jay

[mooseslayer]

I wanted about 22fpe or 800 fps with jsb 18.9 which disco likes , so I am working for that.

[Tater]

I like test two. Thanks for posting those strings John, I'm sure it will help others tuning.

[David Mccann]

i think i am going to try a "thru the hammer" design. and just adj the gap with the tube end cap. i have a prod hammer already. me and the mini lathe wil spend some time together soon. gotta get  some stuff from mcmaster.
your strings are for sure in the acceptable zone. pretty good improvement over stock eh?? gooday

[Buldawg76]

Definitely strings 2 and 4 are very nice and very tight ES as well on only 900 psi of air.

Mike

[mooseslayer]

Yes...I'm pretty happy so far, especially since before, even with some valve, poppit, tport mods to improve airflow I still was under 20 good shots in that range before Bob came out with the SSG.
       All hail Bob Sterne.

[David Mccann]

i had to drill my prod hammer threads out to .250 to smooth it up fairly well through the center. polished it smooth. now the stock crosman spring size wont fit the guide shaft. now to enlarge  and deepen the spring cavity in the rear of the hammer. and order springs. on and on and on. gotta love it. david

[dpittman]

I am doing the same. Going to open spring pocket in hammer .700 depth and .500 width. Open end cap .600 depth .500 width. Having bolt head turned round and recessed into hammer . Gonna try the OEM marauder hammer. Will have almost 2 inches of spring space. Cant wait to see if it all works out. Along with double tube hoping to get 40-50 good shots. Have anew barrel at Mikes (TKO22) getting his prep work and ordered a brass trigger.

[David Mccann]

hey folks, whats up. been fiddling with the ssg . here is what i have so far. gotta get some springs.   

[David Mccann]

i too am pondering a new barrel. i need a 24" long to fit the prod. where to get such an animal??

[Buldawg76]

i too am pondering a new barrel. i need a 24" long to fit the prod. where to get such an animal??

David
You can get a Mrod 20 inch barrel from crosman for a reasonable price in 177 or 22 cal but I still believe the 22 barrels are hit or miss as far as accuracy is concerned. The Prod and Mrod breeches are the same in 177 and 22 as far as I know, but you could possibly make a disco barrel fit in the Prod as well since they all are 7/16" OD and just the transfer port is slightly different between the disco and Prod as well as the bolt probe sealing method for the barrels. I do know a 22 cal 24 inch disco barrel is about 21 bucks plus 4 bucks shipping from crosman if you call them by phone.

22 cal disco barrel part number is 2260SE-001
22 cal Mrod barrel is 2264-001.

The only difference is the Prod/Mrod barrels have the bolt probe o ring in the barrel and the disco has it on the bolt probe so you could cut a groove in the Prod bolt probe for a o ring to seal in the disco barrel.

Here are the links to schematics.

https://support.crosman.com/hc/en-us/articles/203549550-BP2264S-Owner-s-Manual-EVP-2013-

https://support.crosman.com/hc/en-us/articles/203544750-BP9M22GP-Owner-s-Manual-EVP-2008-Present-

Mike

[Dairyboy]

i too am pondering a new barrel. i need a 24" long to fit the prod. where to get such an animal??

Check out Marmot Militia I know Jim makes custom length .22 barrels for prod and guaranteed to shoot great. I just don't know if he does longer than 20" though

[Buldawg76]

i too am pondering a new barrel. i need a 24" long to fit the prod. where to get such an animal??

Check out Marmot Militia I know Jim makes custom length .22 barrels for prod and guaranteed to shoot great. I just don't know if he does longer than 20" though

Dillon
Yea Jim makes very good barrel as I have a 25 cal one on the way but they are 205.00 bucks also so not a cheap barrel by no means, I was just giving him some reasonable priced options instead of spending almost as much as the gun on just a barrel.

Mike

[dpittman]

I got a 2260 barrel from Dennis Baker. Around 36 bucks shipped.

[Dairyboy]

i too am pondering a new barrel. i need a 24" long to fit the prod. where to get such an animal??

Check out Marmot Militia I know Jim makes custom length .22 barrels for prod and guaranteed to shoot great. I just don't know if he does longer than 20" though

Dillon
Yea Jim makes very good barrel as I have a 25 cal one on the way but they are 205.00 bucks also so not a cheap barrel by no means, I was just giving him some reasonable priced options instead of spending almost as much as the gun on just a barrel.

Mike

Very true I wasn't thinking of that. I have his .22 barrel and it's amazing. But that was because I didn't want to play barrel lottery again with the Mrod. My disco barrel is very good so if he had the means to machine his own to make it work I'd say go that route.

[David Mccann]

thanks for the info on the barrel. i cant help but wonder why the mrod mags are different from prod? they have diff prt#. the mrod bbl stick out the back further??? i am using a 2260 bbl in a prod brch, fitted onto a disco airtube and valve. we had to grind a cutter from HHS to "scratch" the oring groove inside the bbl.i say scratch, because the cutter we ground, wound up pretty skinny out near the business end.. it screeched and chattered and carried on if you tried to force it to cut very much at all. soooooooo, it took way too long to accomplish that feat. it did work out though, and doesnt leak there at all. i hate to chuck this one because of the time spent, but the usual winning pellets dont fly consistently . it is strange but it likes AA diablo field 16gr. it will put them in a group that can be covered with a nickel at 21yrds. the rest were 1.5" groups, well, i cant really say they grouped much as it  would just randomly spit them high low lft and rt. im gonna tear it back apart at the barrel- breech area, install Bob's SSG, give things a good looking over, and put it back together. maybee leave the shroud and baffles off for a minute and shoot some. does the single shot tray for the mrod fit the prod??  thank guys for all your help.TALKTOYEZ

 david

[David Mccann]

hello again, how much clearance between hammer bore and ssg guide rod, in a pass thru design??? does anyone have a recomendation? i mean the sliding area, up and down the rod.. how sloppy should it be?? my guide rod is .246. and my hammer bore is .250 it slides good, but if i put up down, or off center pressure on it it feels not as smooth in its action, as when loading it from the center area. maybee this isnt a concern. cheers

[Rivers3Plinker]

hello again, how much clearance between hammer bore and ssg guide rod, in a pass thru design??? does anyone have a recomendation? i mean the sliding area, up and down the rod.. how sloppy should it be?? my guide rod is .246. and my hammer bore is .250 it slides good, but if i put up down, or off center pressure on it it feels not as smooth in its action, as when loading it from the center area. maybee this isnt a concern. cheers

If it were me, I would install it and test it pulling the bolt a number of times to see. Go from there.
What lube are you using on the SSG guide?
Nice work on your machining BTW.

[David Mccann]

thank you sir. i was using a few drops of Quaker State fully synthetic motor oil. im gonna try it like it is and see.... i may polish the sliding area with 1500 first. think ill remove the shroud and try some groups today before dark, before i take the breech off. gooday