Fish will continue to grow as long as there is food available and no predators to feed on them. If they can survive seasons evading anglers and food is abundant, we could expect to see 2-3 foot long fish after 3 or 4 years. Most of the stocked hybrids will be caught within the first year after stocking. Yes, they are edible and probably taste very much like a landlocked chinook. We are really not tampering.
People are illegally transplanting pike.
As well as being voracious predators, pike are fertile fish. That means that they can establish a breeding population wherever they are planted. Hybrids cannot do that. The hybrids will initially compete with other populations for food, but because their population cannot grow they will eventually be caught or die out. Ice fishing during the winter.