How many shotgun cartridges in a slab?

Q: How many shotgun cartridges can I keep at home?

A: You can store as many as you want – there is no limit. You are not obliged 
to lock cartridges away or store them in a gun cabinet. 

• However as a responsible gun owner you must ensure that your shotgun ammunition is stored safely, securely and out of sight.
• Make sure that cartridges are not visible through a window which would show that a shotgun is likely to be on the premises.
• BASC advises you should store shotgun ammunition separately from your guns.
• Ensure cartridges are 
not visible to any casual visitor or through a window where they will 
suggest that 
it is likely 
a shotgun is stored in the property.