I am using the .498 bits. The Astro 3 piece set that I ordered with it.
I'm not going to be back to work where my 4980 is until Monday, but I'll try checking that the piston slides free. I've never really felt like it hung up, but then again I wasn't really checking for that.
I oil it with air...
I bought me a big nasty 4980 last July. Maybe it's just me not being familiar with big bore hammers, but it seems like maybe it's not working like it should.
Since day one, when I'm using it I have lean every bit of my body weight into it when I have the trigger pulled, otherwise the piston...