@ levgen721.-
Please don't take this the wrong way, but what ammunition did you load into your D30's?
A bit of history:
These guns have been Out of Production for at least 10 years.
Still, when this version came out (at least two variations I am aware of), it already had the blue silicon rubber seal that is the standard for all DIANA piston seals.
So the seals were not the problem. Using WD-40 may have changed that, but these blue seals do NOT disintegrate as the old Nylon seals of the Giss action'ed models 50 to 75.
These guns were made for Shooting Stand Operators in Germany, where there are yearly "fairs" at churches. Each church has a Patron Saint, and around the week where the date dedicated to the Patron Saint comes around, there will be a fair in the town square (usually you have the Town Hall, the Courts and the Church on three sides of the square). Since Church in German is "Kirk" and Fair in German is "Messe", these events were known since the Middle Ages as "KirkMesse", the original word behind the "Kirmes/Kirmessen" and the English version: "Kermesse"
They were NEVER intended for final users.
They are complicated because they need to keep a resettable counter (you pay according to the number of shots taken), and a non-resettable counter, so that the owner could monitor the operator, or take heed when the gun needed to be returned to the factory for service.
Again, it was NEVER intended for the gun to be user serviceable.
They were practically hand made and fitted, and they DID indeed had a very high price. The modern/current version, the NEO 30 is all CNC machined and costs over €1,400 in Europe. Again, not intended for end users.
Seit vielen Jahrzehnten steht der Name Diana und das legendäre Mod. 30 für die einzigartige Freude am Schießen. Egal ob Kirmes, Rummel, Jahrmarkt oder das wel...
www.versandhaus-schneider.de
The rifles usually came with a red and grey Loader, that put all the 125 "rundkugeln" or RK (it would be a mistake to call them "BB"s) easily.
Barrels were made to exacting specs of 4.40 mm's Groove Diameter. Rifling is VERY shallow, but enough to be accurate out to 7 meters (21 ft).
Targets were clay stars that hung from a metal plate and so, lead RK were exclusively used.
IF you busted 10 stars you get a fluffly/stuffy/cuddly toy for your date.
Tonsterne, Abschiesssterne auch geeignet für Schießbuden. Farbe: weiß Material: Ton Menge: ca. 100 Stück
www.versandhaus-schneider.de
H&N made these RK by the millions. And still does, but it does NOT sell to end users.
You CAN get them from some distributors under the DIANA brand:
Verkupferte Blei-Rundkugeln für das Oktoberfestgewehr. Optimal auch für Stahl-Ziele und harte Oberflächen geeignet, da Querschläger verhindert werden. Die R...
www.versandhaus-schneider.de
These rifles should NEVER be loaded with steel BB's, not even the Premium brand specced at 0.172"
Because the feeding system is complicated, out of round, or out of caliber ammo generated problems. Savvy operators knew this and stuck to quality ammo. After all, the savings in the ammo would not justify the stoppage of the operation/business.
I had two of these and enjoyed them immensely, within their range they are accurate enough.
Depending on what you loaded them with, the fix may be easy or not.
In any case, you will need to get them serviced/repaired, and the parts for the older version are not easily available.
Sorry for your mishap.
Keep well and shoot straight!
HM