override a base property or make a new one for inheritor?

Another inheritance question on best practice.

if i have weapon property

get projectile

set projectile

and

ballistic weapon

but ballistic weapon has a ballistic projectile (w$$anonymous$$ch inherits from projectile)

do/should I make a new property or override the old one or what.

Basically ballistic weapon class has a projectile (and inherits the get/set property for a projectile from its base class weapon)

however it more specifically has a ballistic projectile w$$anonymous$$ch has t$$anonymous$$ngs like projectile speed that a non ballistic laser weapon doesn't.

So should I override the original getter/setter and have the original getter/setter be virtual or do I make a new getter/setter

I'm concerned if i make a new one that i'd end up with 2 nearly identical properties for one weapon.

it'd have the get projectile & get ballistic projectile when really the ballistic is probably all it needs (since it inherits it can do the generic stuff still as well as specific)

But I was wanting to make sure that is how people who have dealt with inheritance more would do it.