Just bought this gun to have something to do. Does anyone have any ideas on what pellet to start out with? Also places to shoot in the Houston Texas area.
My rebuttal to Frank's comment....
Cue the Monty Python argument video...
I picked up a couple of QB-77s and a 79 from Tim at Mac-1 back in the early nineties. I (with Tim's help) put a 5mm LW barrel on one and it would put pellets through the same hole all day long. The bulk fill option and extra-length tube made it much less expensive to shoot, too. I had a lot of fun with it at the range shooting flys and yellow jackets at 15 yards.
Different strokes and all that... Why rain on someone else's parade when it isn't necessary?
Ride on,
J~
I have an old QB78 that I bought about 21 years ago. Does anyone have a list of o-ring sizes? Mine has a couple nasty leaks that I need to chase down.
I have an old QB78 that I bought about 21 years ago. Does anyone have a list of o-ring sizes? Mine has a couple nasty leaks that I need to chase down.
Cool! I believe that Archer Airguns sells seal kits for the 78. I don't know the o-ring sizes. You'll probably need a tool to loosen the valve with. I made one from a C02 cartridge and a piece fo threaded rod.
How is yours stamped? Is it one of the originals that Tim sold, or one of the later ones that went for forty bucks at gun shows? I'd love to see pics of it.
Ride on,
J~
1. valve -113
2. end cap -113
3. barrel -012 [qty 3]
4. .177 bolt M1 x 2.5 or -003
5. .22 bolt -006
6. Transfer port - not an O-ring but a seal. Use poly tubing commonly sold as icemaker tubing (0.25" OD, 0.170" ID) and cut it to 0.100" long. The length is important. You want it long enough to crush slightly to help it seal but not so long that the wall folds and compromises the seal or chokes off the inside diameter. An alternative is Crosman #130-036 which is a square cross section seal. You will need to replace the poly tubing any time you disassemble/reassemble a rifle but the Crosman part is reusable.
Buna-N in 70 durometer is fine for all of them except the end cap which needs to be polyurethane. You can use Buna-N but it will swell and you'll have to swap it when changing cartridges (it will return to its original size after a while and you can reuse it).