The Bell Hammer Gold you are currently using is highly effective for chain lubrication, offering excellent penetration and low-friction performance. You can continue using it without any concern.
As for alternatives, please refer to the following comparison:
Bell Hammer Gold: ◎ Excellent penetration and lubrication with smooth rotation—ideal for chains.
Metal Grease: △ Designed for high pressure; higher viscosity may attract dirt.
LS Bell Hammer Grease No.0: ○ Soft and adheres well, but may collect debris—use with caution.
LS Bell Hammer Grease No.2: △ Thicker, longer-lasting film, but may cause slightly heavier movement.
For sporting applications where smooth and responsive rotation is important, Bell Hammer Gold remains the most suitable choice.