Locks don't really mean anything as far as determining a timeline. BPs evolved to reproduce in an environment where they may not reliably find annual mates or have the right weather/food/water to support eggs. So they have the option to carry sperm for over a year and reabsorb follicles.

Your best bet for an idea of your timeline is to count from ovulation (and that's an estimate) and watch your females for signs - heat-seeking, pre-lay shed, signs of discomfort, and ridge-back to determine how close they are to laying. There are a few suggested breeding timeline pictures online, too.

I started pairing my breeders in November last year through February, and they laid eggs in May and June.