You might try reading this thread. If I remember right at least some Canadian hatcheries call their Ranger-type birds something else but that's just a marketing name. They are basically the same thing.
https://www.backyardchickens.com/threads/crossing-my-red-ranger-hens.1281099/
It's true the Rangers will no breed true. No hybrid does whether they are Cornish X, Rangers, the commercial laying hens, or crosses you make your self from recognized breeds. By introducing meat bird genetics you introduce meat bird genetics. The offspring will take on traits from both parents. If you cross a Ranger with a dual purpose breed you typically get a bird that is not as good a meat bird as its meat bird parent but a better meat bird than the dual purpose parent. By selecting which offspring get to breed you can shape your flock. Don't expect to get back to the Ranger bird but you can get a flock that is consistently above a dual purpose flock.
Whether you cross dual purpose to Rangers for your parent flock or just breed dual purpose birds don't expect great consistency in size or maturation rates. Some cockerels will grow faster and mature faster than others even if they are pure breed dual purpose. By selective breeding you can smooth that out a lot within a few generations. My goal in breeding birds for meat is not to get the best birds as large as I can, it's the make the worst birds pretty good.
What are you going to do with your pullets? There is not much meat on a pullet and half of what you hatch will be pullets.
If you are just after meat for the market you cannot beat the Cornish X. You have to buy the chicks so they are not self-sustaining but you can't beat the feed to meat conversion rate. In spite of some of the stuff you read on here they can be pasture raised. There are threads on here about that. Other than your desire to hatch your own they sound like they could be a good fit for you. Pullets and cockerels are both marketable. You can buy large numbers of chicks at a time without having to house and feed adults to lay fertile eggs. They will fairly consistently all hit marketable size at the same time. The turn-around can be pretty fast so you are selling them every two to three months as opposed to maybe once every six months. There is a reason the large commercial operations raise these. They are not GMO. I don't know what the "certified organic" rules are in Canada but here in the US whether they are organic or not depends on what they eat after they hatch so they can be raised "organic" if you wish. That might help you fit a niche market.
The Ranger chicks are going to grow slower than Cornish X but aren't bad. I haven't raised them but I believe the pullets also reach marketable size fairly young though they will not match the cockerels.
I don't know what the right answer is for you. In some places in BC you may be able to pasture them a good part of the year. How often do you plan on starting a new batch? Can you fit a niche market if you only offer birds once a month or less often? You are in the meat business so you've probably thought of all this. I wish you luck.