A basic update Idea for either the current or upcoming sp2 is to have the cannon rounds being able to be set to Basic, Explosive and my idea mixed...
How this would work is you set the button to mixed rounds and you select how many rounds are explosive and basic.
There's already the tracer rounds and so it would essentially work the same like that. Take for example you have 750 rounds of basic and 250 explosive rounds every 4th round would be explosive and every other round being basic.