The Secret Weapon Burley Bomb is a brilliant way of getting berley into exactly the right spot, as its streamlined design beats the current and gets the burley down to where it's going to do the most good - whether that be mid-water or right on the bottom. Additional lead can be added to the internal weight cartridge if needed, but the Secret Weapon Burley Bomb also has a hole drilled in the nose so it's possible to tie on a snapper sinker for additional weight when fishing deep water or an extra strong current.
Rig it on a heavy hardline - perhaps with a short length of wire at the business end as sharks have been known to pinch the odd one - and you're away. Secret Weapon Berley Bombs are traditionally used offshore, but are equally effective in estuary fishing situations, such as when bait fishing for bream in a strong tidal run.