No. Really no. It should only be used with a snaffle. If you are having that big a problem, get your horse checked over physically (teeth, back, saddle) and then have some lessons with a good instructor. What problems are you having anyway that whould lead you to consider that combination?
what im trying to say is he just flops his head down really low and just seems like a bit of a donkey just needed his head to be bought up and in a bit.
I am a wee bit confused. In the first bit you say he is strong and want something to hold him back, then you say he seems like a bit of a donkey. Perhaps i am picking it up wrong.
Schooling will help him to go in the correct way. You can't use a MH with a pelham. It should only be used with a snaffle.
i dont like market harborough's myself . i prefer to use a Harbridge Training Aid. my boy gets ridden in either a rubber mullen mouth pelham,cherry roller snaffle or dr bristol snaffle depending on what i'm doing, i use the Harbridge Training Aid with all but the dr bristol.
must add that my instructor introduced me to the Harbridge Training Aid.
My friend uses a MH with a mylor bit, the reason he wears a MH is because he used to throw his head up so bad that he would almost whack you in the face! He had no top line just loads of muscle under his neck, he had his teeth/back/tack checked and it was all fine, he done this really bad when she bought, he's improved lots in the past few months.
I have used the MH with great success but with a snaffle. However, long term I was able to school my horses so it was not needed.
The only time I broke that rule is that with Breeze, my very strong old TB I used a MH with a Dr Bristol for hunting and XC - this gave me control and brakes. As I didn't get Breeze until she was 23, and she just knew bounce and flat out, it was the only thing that gave me control when she got very excited.