Coniferous seed balls?

I've had a decent amount of red spruce and red and white pine seed come my way. I don't have the time to do trays of jiffy pellets at the moment. I was wondering if anyone has tried any seed balls with these species and any luck if so?

Thanks!

I know tree seeds rarely do well at near surface depth.  I would recommend the balls be quite a bit bigger, say 1 1/2 to 2" in diameter.  They will slump when wet and that just might be "whistlin' Dixie>