I raise a considerable number of chickens. I sell lots of chicks and eggs.
I can only tell you what happens here.
I have certain pens that are free fed and a few pens that I feed once a day.
In the free fed pens, my egg production will drop drastically if their feeders go empty for any length of time. I have approx. 85 - 90% of the hens laying every day.
In the pens that I feed once a day, the egg production is a lot lower than the free fed pens, but the chickens also still maintain a good weight, are active and healthy. The hens in these pens have an approx. 65 - 70% laying ratio per day.
So, with my chickens, I get more eggs if they are free fed. They do consume a little more feed, but I feel that the increased egg production is worth it.
If you choose to not free feed, I would think it would be better to feed several meals a day, instead of one. Do you have things in their runs to entertain them between feedings?
Mine love to pick through alfalfa hay, and I sometimes throw in some horse manure for them to scratch through.
I also feed a pellet instead of a crumble. I have a lot less waste with pellets, which means less feed.
You will just have to decide what will work in your area. If your hens are producing well enough with you feeding a ration, then stick with it. If you do not have at least 80% of your hens laying every day, I would increase the feed a little at a time and see if that helps.
I have noticed here, that any changes I make, it takes at least 3 weeks to see any differences.
Good luck and keep us posted on what you are doing and how it is working for you.
Jean