After noticing my front uj on my prop had lost it's grease nipple which hadn't been missing for too long I then decided to replace and regrease.

I have two grease guns with one I filled with copper grease after dropping and splitting the container which it was previously in. I have now packed the front uj with copper grease by mistake after picking up the wrong gun.

I haven't run the car yet but would I have to strip the uj to get the copper grease out as I'm led to believe that the copper variety is to abrasive for bearings?

I would flush it out using the correct grease rather than stripping the prop off the car and dismantling it.

i have seen copper based grease bugger a clutch release bearing.......

the results if a prop bearing fails, may not be as safe..........

Last year I had the prop come off at the front because of the sprocket adapter coming loose and still makes me a little afraid of the car.

I think I would feel better taking it apart and getting every bit of it out...... but would it all flush out or would it just mix and leave a certain percentage of the copper grease behind?