I haven't ever done it myself, but I've read of others' experiences with it. Judging from that, you more than likely won't get the same plants, but if you have the room, why not try for grins? If you know what kind of corn were the parents of your hybrid, you'll know what some of your corn will be like, but some of it will be VERY different ~ very probably even not tasty.
Yes, all of the open pollinated varieties were hybrids at one time or another, but it took YEARS and generations to weed out the rejects before a person could be assured of having a pure crop. The way it works is something like this (not all will be these percentages, but it's an example):
1st generation ~ 25% what you want, 25% the OPPOSITE of what you want and 50% somewhere in between but still rejects ~ toss all but the 25% you want (you'll have to wait until the plants mature and you eat the ears before you'll know which is which) and save seed from the best plants that are left after taking measures to avoid cross-pollination from other crops if possible (a tricky thing in corn for sure)
2nd generation (probably second year) ~ 35% what you want, 20% opposite of what you want, the rest in between but still rejects ~ isolate for true seed and save from the best plants
3rd generation (probably third year) ~ 45% what you want, 20% opposite, rest still rejects too ~ isolate and save seed from best plants
And on it goes for years until you get seed that will produce 99% true-to-type seed. Even nowadays you'll get a plant or two every now and again that will crop up in your open pollinated crop that's weird and definitely NOT true to type. These need to be pulled and NOT allowed to pollinate any other plants.
