Overachiever or show off?

[nettech864]

I think one of my hens is trying to show off and see how big of an egg she can lay.
They are all about 20 weeks old (sapphire gems) and have been laying for about a month and this is is what we found this morning. The large one is nearly 73g!

 

[oldhenlikesdogs]

Generally the really big eggs are double yolked.