Beeman R7 (early) barrel up & down play

[HPP-Mechanic]

[happymecanic]

Hi Frank, on my modern HW30S (2015?) the ball protrudes about 1/8'' out of the breech block, make that a nominal 3 mm. HTH.

[Bayman]

Here's my 30 with a 4mm pin just laid in place

[Bayman]

More pictures

[Bayman]

Another

[Mark 611]

The other thing that could bad is the spring under the ball, it may have lost its memory and will no longer spring back with enough tension to hold the ball in place, 

[Methuselah]

Another

I see some galling behind the ball on the "ledge" that rests against the receiver ... seeing the mating contact area on the receiver might help, however, I'd have to say truing the two surfaces that mate up might be beneficial even if it's not the root cause.