I've said this before, I'll say it again. Do what works for your horse. If what your using isn't working then do some research and look for something that will.
There are several good books out there on bits. I just finished Bob and Dale Mylers A Whole Bit Better and have started Ed Connell's Reinsman of the West Bridles and Bits.
The Myler book is very basic on how the bit affects the mouth and head. Its a very informative book even if you don't use Myler bits. I think both can be bought on Amazon or Ebay.
Educate yourself on what your bit is doing is my best advice.
"Until one has loved an animal, part of one's soul remains unawakened..."
- Anatole France