I had a male mojave 300g - 500g, can't remember that bred several females his first year. That first year only one female laid eggs. This past year I had a very small 300g pastel that bred a spider. The pastel was actually older than the mojave, just lighter in weight. So, I had eggs from him too, one pastel, one bumblebee, and one spider. Great odds, I thought!!
I think the younger, lighter males can do it, just not many. So if I have a young male like that, I will only match him up with one or two females. I have a pinstripe male that would not breed anything his first year, even though he was upwards of 700 grams. This year was slow, but after putting him with another male and female, he got with it. Even though his weight is good, I am still only matching him up with like 3 females. Only expecting one clutch though. Just because it is his first year.
As a side note, that mojave above is in his third year now. I will see how many clutches come out of him this year, but his second year was great. He had 5 clutches last year and every clutch was more mojaves than normals. That first clutch there was only one mojave. I can't remember for sure but I think last year was like 11 or 12 mojaves out of 18 or so.
Last year I also hit on a pied with the parents being two het pied half sibs. It was their first year too, and every single sibling of the pied (6 egg clutch) were ringers with the het markers on the bellies. For a first year breeding, I think that was great too, but we will see this season what happens.
I am not sure if it gets better in odds or not. It seems the more seasoned the male is, the more females he can handle, but maybe that is just me and my luck.
Good luck!
Katrina