Diana Looks like my Diana 35 needs some TLC...

[Pellets&Pistons-(Razor62)]

I grabbed my old, 1970 Diana model 35 out of the safe last night and sat down at the bench with it for a while. I couldn't get it to stay on zero no matter what I tried. I was beginning to think that the cheap, CVLife scope had bit the dust, but I ran it over the chrono just to satisfy my curiosity. I think I've found the problem. Just check out the chrono string below. Look at that velocity spread! Pretty sure it's got a broken mainspring along with a bad piston seal. She's goin' on the bench soon. Possibly as soon as tomorrow.

 

[Mycapt65]

Nice looking rifle. I know you'll get it sorted out beautifully

 

[MDriskill]

That's a lovely example of one of my favorite rifles. Given your experience and abilities, I'm sure you checked the breech seal first!

But yeah my guess might be mainspring. It's hard to kill the leather piston seal in old Dianas (and even harder to remove it, the securing screw is staked with a blind pin).

I have one of these that needs some work, too, so looking forward to the follow-ups.

 

[Pellets&Pistons-(Razor62)]

Breech seal is good. I know all about the old, leather Diana seals. hopefully, as you say, it'll be fine. I'll probably record the repair for the channel.
This rifle buzzes like a bee hive. Can't wait to sort it out.

 

[cjtamu]

I’ll be following as well. Mine is actually a Winnie 435. Chrono numbers look like a PCP gun. And they’re such beautiful rifles. Has a trigger issue that MDriskill helped me with a few years back. Think I’ve found the fix so now we’re shooting again hoping to get it up and running soon.