The 2nd Model 760 might be more challenging than I thought...

[Methuselah]

I too tried the derlin, initially it held one pump but 2nd or 3rd day I found it had no pressure and wasn't sure I'd remembered to pump it.

Now it sometimes takes a few strokes to start building up. If I'm shooting repetitively it seems we'll behaved. I'm leaving it with 5 pumps and will see if it it holds that.

I do wonder if the increased pressure is bad for it?

[Methuselah]

Results are buried in another post

https://www.gatewaytoairguns.org/GTA/index.php?topic=217262.msg156576633#msg156576633

https://www.gatewaytoairguns.org/GTA/index.php?topic=217262.msg156576869#msg156576869

Maybe links thingy will work(?)

[Methuselah]

It holds at 5 pumps. Likes Benjamin hollow points and copperhead BBs.

Leaves me one I recently picked up in parts, broken plastic transfer port thingy at breach (where on screw holds it), missing butstock nut, band screw & nut, and nubs that hold barrel by hammer spring are all but gone in the plastic receiver halves. I'm debating if it's worth the effort.

I read your postings on your 760 work and followed the links, wow, nice work indeed. I especially like the shimming to shorten sear engagement and the trigger stop (I've never tried one with that feature). Great work indeed!

Pics

[Hoosier Daddy]

Posting future reference...
 I got a buddies childhood 760 to rebuild for him.

[Methuselah]

Posting future reference...
 I got a buddies childhood 760 to rebuild for him.

If it's metal receiver you should have better luck than the box of parts gun I referred to from Ebay 

Next one I do I'll have a proper roll punch instead of pin punch to use on it.