Where are you getting stuck on the push up? It's possible that you may need to add some accessory exercises to bring up the lagging muscles? Like, if you were getting stuck just near the end of locking out, your triceps may be lagging...
It's always at the bottom part when my nose is touching the floor.
If you want to do handstand push-up's I'm not sure graduating from different inclines would help much. As of now, you may be working your pecs more than your shoulders but as you increase the incline, your pecs become less of the major workers and more of the stabilizers.
I definitely understand what you are saying and on the current incline I am working with my pecs are definitely the major muscle being worked. But I have been waking up with a little muscle ache in my anterior deltoid also; so I know they are being worked somewhat too.
Maybe you could start doing some assisted handstand push-up's somehow with resistance bands or something, then finish the workout off with some tricep and delt assistance weight lifting exercises. Just a thought.
I think that adding resistance bands is a great idea. I've ordered one off of eBay and will definitely include assisted handstand press ups in the progression somewhere. Thanks!
As I've heard/seen typed, if you want to get better in something, you need to do that particular exercise not some form or variation of it that uses radically different sets of muscles. Doing the exact exercise but with assistance will get your stabalizer muscles used to the hold that is required to keep you balanced also so it will be easier to transition from assisted/being held up to free hold handstand push up.
My intention is to keep raising the incline until I am doing handstand press ups with my feet resting on a wall. That way I will allow my body to adapt to being upside down (if I need more help in this I may purchase some anti-gravity boots and hang upside down from my chin up bar). When I am able to do 3x20 press ups with my feet resting on a wall I believe my deltoids will no longer be the limiting factor in the lift but as you rightly said it will be my stabiliser muscles. Any attempt at doing the handstand press up when I know my deltoids will be the limiting factor is a bit premature in my opinion since they will be the main mover in the lift.
Thanks for the constructive criticism!