Why?
Matt
I'm not sure which of my three sentences you are questioning so I'll respond for all.
1. I'm on the fence about hatching pullet eggs.
I've read/heard both pros and cons (did you want me to list them?) for hatching eggs from pullets as soon as they start laying through waiting up to 2 years to select breeders. Most of it is anecdotal. Right now I am planning to select breeders at 12 - 14 months. It's not easy to wait sometimes, but experience has taught me when I've been most in a hurry for results was typically the time I should have exercised patience.
I'm guessing this varies from breed to breed. The HRIR I've seen don't begin laying until 26 weeks old and then their nutrition for show quality feathering is being diverted to eggs. So picking breeders from pullets seems to be easiest right about 26 weeks. The cockerels begin to weed themselves out all along but the finalists don't really mature until they are a little older... 9 -10 months.
So... If you hatch in the spring you should be able to pick your breeders pretty easily by the first of the year.
Now... That said... even the most beautiful hen/cock combination does not assure gorgeous offspring. But I personally don't want to feed them an extra year to learn what I want to know about how they produce. Some will make it back to the breeding pens the 2nd year and some will not.