how old is he? if he's too young then he may not be interested, and if he is theres a risk that your female will lay lots of slugs so she would go through the process for nothing
~~ My Zoo ~~ 1.0.0 Bearded Dragon - Cooper 0.1.0 Amel corn - Lucky 0.1.0 Normal Leopard Gecko - Layla 1.1.0 Cats - Zelda the Maine Coon & Link the Ragdoll X Tabby 0.0.50 Malawi Cichlids 0.0.20 Community fish tank
if hes an 07 or older id say hel be fine to breed with smaller females 300/350 grams ish my smallest has been 120g and i have a full clutch of fertiles in the bator ! do what you feel is right