For use in a pigeon hide I use one of the £1.99 extending magnet things for cars. It has a rubber grip on 1 end and a magnet on the other. When folded it fits into my cartridge bag and has made things easier when picking up the spent cases ejected from my auto. I also have a 'Gripstick' a bit like the green thing pictured already. Someone left it in the boot of my car after a game shoot, some 8 years ago. I did contact those that had been on the shoot, but nobody claimed it. It is not the lightest of things, but has a clip to fix it to the sling on a gunslip. As for using it at a clay ground, the problem is, if people are waiting to shoot I try to get out of their way as soon as I have shot. No problem with catching the shells from the O/U but the auto chucks the empties everywhere. If they land inside the cage I will pick them up by hand, those outside the cage I leave. I do make up for it by picking up all of the empties left in the cage by others, before I shoot, most of which have been chucked there by break open guns.