You're losing weight not because of the types of bow, but because of how you try to tiller, and I'd wager my back quiver on that one
When you rough the bow in, you'll want to get a long string on it as soon as the floor tillering starts to come close. Get it bending early, but slowly. Take it to brace height and
watch for early string follow. As soon as it starts following the string slow down and reevaluate the bow. String follow is the enemy of energy storage. You shouldn't start seeing anything until after you've reached brace height and are taking it out towards the final inches of draw.
Once you get it braced (and keep the brace low, never over 5" this early in the game) and it's standing straight, begin tilering it towards the half draw marker, or a little further. Badger's "No Set tillering" has you reading the weight at around 16" with your scale. As you slowly increase the draw, keep watching the weight at 16". If you start to lose weight, unstring the bow and check for thick spots, stiff areas, anything that might need a little taking down to keep the bow from being overstressed. Keep going like this until you reach your final draw length. Likewise, if at any inch-increment the below about 24" the bow starts pulling more than what you want it to at full draw, shave the whole belly down. No reason to over stress the limbs with too much weight either.
If you're careful when tillering and lay out the bow well, there's no reason you can't make a good hunting bow with what you have, no exotic designs or fancy laminations needed.
Oh, and for the record, I just finished out a fiberglass laminated longbow for my friend Art... and my selfbow still outshot it