Broke 2 shocks in 2 outings, any ideas why?

[Tommo]

hmmm, mine are fitted concave side upwards, always figured this was the way it went as it held the bush in rather than encouraging it to splay out. Ill see how it goes. but ive got 300tdi axles and the shock mounts have the inner cup fixed to them and that is concave side facing the bush. 

[Range Rover Blues]

Ahm there is another point, if the original bush "cup" is still there the bushes are a lot stiffer,aftermarket shicks are not necessarily designed to have these in place.  If they are thee you definitley want you washers convex side in, otherwise the bush is too constrained (you might also hear the washer hitting the cup).