I started with a little brass 40mm Sterling and moved onto a Master 3 (#317), this little bastard had me for a while but I suddenly had an epiphany with a bogota single pick (upside down!) and can pop him in a few seconds now. I moved onto a 50mm laminated Kasp 130 and am starting to think I over reached a bit too soon, what do you think?
http://www.kaspsecurity.co.uk/Product-C ... s.htm#null (I think this guy has some mushroom pins)
Should also add that the keyway in this padlock is seriously tight for space

Maybe I should take a step back and try a 'normal' 5 pin first ?