I'd strongly advise you to make them unloaded, you can still engrave the firstbits or whatever and give them a denomination.

Reason for this is that a lot of members of the community have seen the harsh reality of loaded coins recently. We are now down to a handful of manufacturers that can be trusted (and who knows, more scandals might occur.)

So that would be my recommendation, I think you'd find it easier to deal with everything going that route too.