GTA

PCP - HPA - C02 Gate => QB-7X Gate -W/Co2 & HPA => : hiroller September 14, 2008, 12:11:04 PM

: QB-78 Breech - Leak?
: hiroller September 14, 2008, 12:11:04 PM

It's been a pleasure shooting my new MM QB-78 these past few days; it's pellet on pellet accurate and just an overall joy to shoot. I'll probably hunt with it this week. I noticed something with this gun though. Oil seems to leak a little where the breech meets the tube. I'm guessing it's the pellgun oil I use. Now I add a drop on each powerlet, every reload and am wondering if I'm over oiling? I know too much can't be good either. How often should I add oil to the powerlets when replacing them? It's not bad at all, but I do notice that after shooting a round there's oil spatters on the tube right below the breech.

: Re: QB-78 Breech - Leak?
: Jaymo September 14, 2008, 12:18:30 PM

I think you might be over oiling just a bit. I'd try a drop on every 3rd or 4th powerlet. Maybe less often. I'm sure someone will chime in with the proper frequency.

: Re: QB-78 Breech - Leak?
: mikeiniowa September 15, 2008, 01:16:42 PM

Sounds like more oil than you need........shouldn't have to lube it but once every two tins of pellets. To much of a good thing is not good....could also be some drip down from the bolt...

: Re: QB-78 Breech - Leak?
: hiroller September 16, 2008, 12:03:14 AM

Thanks Mike.  Yeah I didn't oil it any the last two sessions and so far so good.

: Re: QB-78 Breech - Leak?
: SDale September 16, 2008, 02:23:32 AM

Could also be that your transfer port seal is a bit gnarled up.