What cuts of meat do you guys recommend for grinding your own hamburger?
I usually use chuck roasts.
I thought the pink slime was mechanically separated chicken.
equal parts chuck, short rib and brisket. Add a bit of beef tallow.
I just watched an ATK episode where they made their own burgers by grinding the meat. They used Sirloin Steak Tips. They kept calling it “flap meat” in the episode. It looked similar to flank steak but was actually part of the tri-tip from what I gathered. It looked really good. They added some butter to the ground meat because it wasn’t very fatty.
Ask your supermarket about their meat. I know mine grinds their own and you can ask what they used. I’m sure companies like walmart get the pre-packaged pink slime laced crap.
edit: just read the recipe and it was “flap” not “flat”. I’ll have to research that a bit.
Tallow is better than butter because of the differences in melting point temps. You’ll end up with moister meat (and who doesn’t like moist meat)
When I make sausage I use packer trimmed brisket, it’s got about the right amount of fat. I may have to start grinding it for burger meat.
Chuck and Sirloin. I avoid commercial ground meats because who knows what’s in them. And now we know… 
I use mostly chuck (it has the best flavor) but when I can I add trims from various other cuts including the short ribs and brisket. I also always add about 10% not-too-lean pork as well (generally from the shoulder butt). The best burger I ever had (in a bar in central Iowa 41 years ago) used this mix.
Lately, I’ve also been ‘chopping’ the meat in a food processor rather than grinding it, or when I do use the grinder, I use a coarser blade plate than typically used in supermarket ground beef. The resulting difference in texture takes the burger to a new level.
I use ground chuck that’s typically about 80% lean. I wasn’t aware of “pink slime” until I read this thread. This is an eye opener for me. I will ask the supermarket butchers if they use it.
when we take our(ok my parent’s) cattle in for butcher, they use chuck roasts and other leftover roast pieces. it really depends on what steaks and roasts we want out of it first, then they grind leftovers for burger.
I pretty much do the same with wild game burger… use leftover ‘roast’ pieces and blend back in some pork or beef fat, depending on the game.
I guess it’s a little different if you’ve gotta buy all the stuff at the store since they don’t really have packages of ‘leftovers’. Or maybe they do, might be worth an inquiry… heck, I get fish carcasses from the local (for free)… just gotta ask for it.