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Air Gun Home Forum Index » Rifles » Just got a QB 78D    View previous topic :: View next topic  Just got a QB 78D   Posted: Sat Nov 28, 2009 12:52 am Mar Veteran Member Joined: 21 Sep 2007 Posts: 428 Location: Victoria, BC WOW! Nice one, can't wait to play with it.   Posted: Sat Nov 28, 2009 3:50 am Alstone Moderator & Site Supporter Joined: 01 Mar 2007 Posts: 4139 Location: Linconshire, ENGLAND Hi Mar welcome back, nice to see your getting kitted out again. Have fun Al _________________   Posted: Sat Nov 28, 2009 4:45 am Brutuz Senior Member Joined: 12 Jan 2009 Posts: 504 Congrats Mar. Are you going to play with it as is or are you going to play with the internals first _________________ Crosman [1300 1322 1377 1377c 1389 2289G Mark II SSP250 2300KT 2400KT ] Sheridan [HB20] Haenel [III 284] SMK [XS78 Deluxish] My vids on Youtube   Posted: Sat Nov 28, 2009 12:59 pm Mar Veteran Member Joined: 21 Sep 2007 Posts: 428 Location: Victoria, BC I just finished honing the trigger and adjusting. Waiting for folks upstairs to leave so I can shoot it for the first time.   Posted: Sat Dec 12, 2009 12:21 am Mar Veteran Member Joined: 21 Sep 2007 Posts: 428 Location: Victoria, BC I've been trying different pellets but this rifle with the lowest iron sight setting still shoots 3" high at 30'. Is that usual for these rifles? Seems accurate though. I'm ordering a scope anyway as my poor eyes don't see that clear anymore.   Posted: Sat Dec 12, 2009 3:23 am Alstone Moderator & Site Supporter Joined: 01 Mar 2007 Posts: 4139 Location: Linconshire, ENGLAND Mar wrote: I've been trying different pellets but this rifle with the lowest iron sight setting still shoots 3" high at 30'. Is that usual for these rifles? Seems accurate though. I'm ordering a scope anyway as my poor eyes don't see that clear anymore. Have a look if the hole in the end of the barrel comes out in the middle, I'm not joking I have one that can shoot around corners. Have a look here, this is a QB barrel I got from Archer Air Guns in the States. If the hole is pointing up then that could be your problem. http://airgunhome.com/agforum/viewtopic.php?p=27509&highlight=barrel#27509 Al _________________   Posted: Sat Dec 12, 2009 9:24 am Mar Veteran Member Joined: 21 Sep 2007 Posts: 428 Location: Victoria, BC Ah so now you want me to take it apart, eh! Al did you ever fix your problem? I haven't played much with it cause recently I got into bow building and that keeps me occupied trying to turn a stick into something shooting a stick. I need to go over the whole gun as I noticed when I cleaned up the trigger that there were loose screws such as, loose barrel band and whatever I could see. I really should dismantle the thing and go over it some day when I get a seal kit.   Posted: Sat Dec 12, 2009 12:51 pm Alstone Moderator & Site Supporter Joined: 01 Mar 2007 Posts: 4139 Location: Linconshire, ENGLAND Mar wrote: Ah so now you want me to take it apart, eh! Al did you ever fix your problem? I haven't played much with it cause recently I got into bow building and that keeps me occupied trying to turn a stick into something shooting a stick. I need to go over the whole gun as I noticed when I cleaned up the trigger that there were loose screws such as, loose barrel band and whatever I could see. I really should dismantle the thing and go over it some day when I get a seal kit. Un-fortunately Mar I never sorted it out at least not on the QB, I kept cutting 2” off the barrel at a time to see if I got to a good bit, in the end I cut it down to 7” and re-machined it for the 2240 and it work very well, so all was not lost. My original barrel is now back on the QB and 4” shorter but it shoots ok now. What I would do with your QB is completely strip it down and give it a good check over and polish, they are cheap and nasty guns but with a little care and attention they can be a cracking addition to your armoury. See http://www.airgunhome.com/agforum/viewtopic.php?p=3200&highlight=polish#3200 Have fun. Al PS: Make sure you have spare barrel to reciver O-rings as the first time you take the barrel out it will tear the seals (Three), you will need to remove the burrs of of the gas transfer port in the reciver, it's this which rips the seals. _________________   Posted: Sat Dec 12, 2009 1:46 pm Mar Veteran Member Joined: 21 Sep 2007 Posts: 428 Location: Victoria, BC I plan on doing a complete strip down as I have most of my guns but first I should round up some o-rings and stuff. I had been wanting one of these for a long time and the Deluxe is a nice rifle and pretty much know what to do after reading so much. I really like it and can't wait to take it camping with me next year, should be ready by then. Thanks for the link, hadn't seen that one before.   Posted: Sat Dec 12, 2009 3:07 pm Alstone Moderator & Site Supporter Joined: 01 Mar 2007 Posts: 4139 Location: Linconshire, ENGLAND If you have the Delux model then it is better built than the bog standard one, so you shouldn't have to much to do. Al _________________   Posted: Sun Dec 13, 2009 5:30 pm Mar Veteran Member Joined: 21 Sep 2007 Posts: 428 Location: Victoria, BC Yes it's the Deluxe model. Went and visited someone today and got a seal kit, a hammer kit and also ended up with a breech with modded probe so I'm all set to go. Question is...What does the hammer kit do?   Posted: Sun Dec 13, 2009 6:15 pm Alstone Moderator & Site Supporter Joined: 01 Mar 2007 Posts: 4139 Location: Linconshire, ENGLAND I'm not sure which "hammer kit" you have but it could be a power adjuster. What does it say on the box? Al _________________   Posted: Sun Dec 13, 2009 6:20 pm Mar Veteran Member Joined: 21 Sep 2007 Posts: 428 Location: Victoria, BC Dosen't say much Al, just a kit from Archer Airguns. looks like OEM to me.   Posted: Sun Dec 13, 2009 6:59 pm Alstone Moderator & Site Supporter Joined: 01 Mar 2007 Posts: 4139 Location: Linconshire, ENGLAND I have just had a look at Archer and what you have bought is a replacement hammer assembly, basically the same as what you already have. It will probably come in handy if you want to experiment some time. Al _________________   Posted: Sun Dec 13, 2009 7:49 pm Mar Veteran Member Joined: 21 Sep 2007 Posts: 428 Location: Victoria, BC It's what I figured also. Now what kind of experiments could I do? 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