Ok I have an update. I have always ground on the medium plate and I did the initial first ground on medium, the one where it bound up, and then on small. Yesterday I ground on the course plate first and it ran through better and didn't bog down the same and went through fine on the small plate after the second freeze.
I will still try and find a better grinder, but I think I figure on the medium plate was compressing it too much. Dave I did check the blade and its got a very clean edge on it.
Glad to hear a switch of plates helped.
I honestly don't grind any of my meat frozen. Fridge cold yeah, but not frozen. The pork fat I grind is frozen but that stuff thaws so quickly that it almost doesn't count as frozen.
With my limited grinder experience what I believe I have learned is that if you have a grinder there does NOT get hot then the extra emphasis on grinding partially frozen meat is not such a big deal.
From all my research and using some of my personal experience it seems that all the effort of putting grinder pieces in the freezer and using half frozen meat is to deal with grinders heating up.
Yes partially frozen, the meat plays better and fat doesn't smear so much, etc. etc. etc. but I have yet had an issue grinding very cold fridge temp meat (not frozen) with my grinder which does NOT heat up on me.
My model is not made anymore but I have the Waring Pro 400 Watt Grinder. I believe they make a 450Watt version now.
Mine is not the fastest in the world but I do about 100-125 pounds of grinding with it no problem and it never heats up.
I'm a 1 man operation and since it isn't blazing fast, I can cut strips of meat and fat to supply the grinder while it brinds. So I can cut and grind at the same time! It actually turns out quite time efficient for me.
Anyhow if you get to shopping for a new grinder be sure to also check for heating up as being a big factor for making your choice. You really don't get much time saving if the thing is a billion horse power but you have to spend hours freezing the parts and the meat all because the grinder heats up and cooks the meat within 20 minutes of use.
Best of luck! :)