XS60C - The questions I didn't think I'd have to ask...

[Back_Roads]

 Just for reference I have a Hatsan pistol that will leak down if I leave it below 150 bar, it just started this, if I fill to 200 bar it holds for weeks.

[Methuselah]

Just for reference I have a Hatsan pistol that will leak down if I leave it below 150 bar, it just started this, if I fill to 200 bar it holds for weeks.

A stiffer spring, alternative material, elimination, etc. at this bleed valve might be a good workaround for disassembly and polishing. Just leaving it alone, I'd expect a little wear-in over time to make it hold better at lower and lower threshold. However, as Mike graciously pointed out, it was unreasonable for me to expect it to hold at pressure well below its design. The more pressure the better the seal. And OF COUSE Mike was right to (eloquently) point out you're not using the rifle at 400 fps with expended cartridges.

I just hope nobody reads what I wrote and thinks there is anything wrong with this model - it was simple ignorance on my part.

As to 150 bar leaking now when it used to hold before, if there is similar valving design, a weakened spring, fowled seat, worn seal material ... , well, I reckon you know a lot more than I do ... point taken, thanks James

[Back_Roads]

 Yes 10 year old seals are showing signs in my case.

[Methuselah]

I haven't been shooting it bc I consider it too loud for the back yard, but I loaded two cartridges in it yesterday and attempted to get it sighted in. Still under the breakin shot count, and no idea if the Chinese Win Domed are "suitable", but it prints small groups at 10 yards, hits pretty much what I aim at using the irons at 25 yards.

Only thing is I had to jack the rear sight almost all the way left, and the first two or three rounds were high and worked their way back down. I ran it over the crony before the last salvo, then fired until it settled, and took a 2nd read - matched exactly, 651.6 fps. Not sure what that's trying to tell me. Front sight leans right, so I presume centering it will put the rear sight closer to center...

The rear green optic fibers are very dim, reckon I'll remove them and order some red ones since the front is very visible.

[Methuselah]

Two more cartridges, I think the recommendation was a couple hundred break in rounds. Still Chinese Winchester Round Nose, 20 rounds, 10 at each target. Was at the pistol range as a guest (otherwise only open on weekends). Next to me, 9 mm auto going off so paused when firing. I suspect the flyers are either first round or first after delay for the 9 mm nearby.

Several extra pauses on target #2 while we exchanged some stories.

When I finish these two cartridges it will be around 200 pellets. Outside of the inner red ring is just under one inch. I didn't measure the groups and haven't ordered/replaced the green optic fibers yet.

(as usual, type using laptop's keyboard, edit and add pics from cellphone)

[Methuselah]

Got the recommended 200 or so pellets down range.

Didn't take the pic, but tried RWS superdomes at about 13 unmeasured yards, first shot low probably because only one cartridge as second one is not pierced until after first firing. Interesting as I thought it would have been full pressure (?). Rest were grouping pretty tightly but didn't take the picture.

Not sure if it was magic number break in or it doesn't like the CPHP, Win Domed, and H&N FTT's in 4.52 but it may be time to add a scope and see if it's as accurate as I think it is.

[splitbeing]

Looking forward to it.  What range are you thinking?

[Blowpipe Sam]

That's some nice shooting with irons!  Looks like your foresight might be a bit tweaked.  If the cartridges are not punctured reliably try placing a dime between the carts when installing fresh carts.  People have reported that some brands of carts won't reliably puncture in the gun.

[Methuselah]

That's some nice shooting with irons!  Looks like your foresight might be a bit tweaked.  If the cartridges are not punctured reliably try placing a dime between the carts when installing fresh carts.  People have reported that some brands of carts won't reliably puncture in the gun.

Thanks.

Tightening the cap punctures one cartridge, firing punctures the second one.

This was the target with the superdomes.

[Methuselah]

Looking forward to it.  What range are you thinking?

Usually start at 10 due to NFH, then move to 25 if 10 was OK.

I wish I had taken my time with that group, it was better than I was expecting

[Methuselah]

Norma golden trophy ft heavy pellets were recommended on the bargain gate. Tried them, below pics, not bad.

Also wrote and called MM, hoping to buy a new seal for the cap. No luck.  Anybody heard from him lately? I hope it's not health issues!

Pics

[Back_Roads]

 IIR any paintball bottle oring would work, might be able to match one up a a local hardware also, Mike may be on vacation, and IIr best to call between 10 and noon.

[Methuselah]

IIR any paintball bottle oring would work, might be able to match one up a a local hardware also, Mike may be on vacation, and IIr best to call between 10 and noon.

I reckon I'll have to try calling again when you suggested, thanks James.

Hope I do this right, it's this seal...

https://www.gatewaytoairguns.org/GTA/index.php?topic=212783.msg156516041#msg156516041

[Back_Roads]

IIR any paintball bottle oring would work, might be able to match one up a a local hardware also, Mike may be on vacation, and IIr best to call between 10 and noon.

I reckon I'll have to try calling again when you suggested, thanks James.

Hope I do this right, it's this seal...

https://www.gatewaytoairguns.org/GTA/index.php?topic=212783.msg156516041#msg156516041

 OK I had the large Oring in mind that goes on the threaded cap.

[Methuselah]

The finish on it is kinda poor, it's the degassing valve and I'd likely have to destroy it to get it off so I can polish the brass where it seats.

The other end seals against plastic, no clue how to improve upon that.

[Blowpipe Sam]

If I have any criticism of the XS60C it is the degassing valve.

Mike was shipping the guns with a plain 2240 style cap as well as the degassing cap when I bought mine.  I quickly decided that it was too finicky for me. 

If you can get the plain style cap IMO it's a better proposition.

[Methuselah]

I have a fairly new 2260 (still holding gas after a couple months...)