If you're not using a suitable powder, and in the right amount, then you'll have problems. If BTs and SSTs won't shoot at all, then there's something wrong with the rifle. But, you've indicated there is nothing at all wrong with the rifle as evidenced by its demonstrated appetite for certain inexpensive factory ammo. In other words, the recipes you were using are most likely to blame.
I'm here to give and receive knowledge, not affirmation or adoration. If you don't like it, mierda dura
. Intellectual honesty is not for fragile egos.