When I fly to the Open Championships, I fly Southwest so that my bowling balls can travel for free. I check two 3-ball totes, and they come on just about 50 pounds on the dot, and that's without any shoes or extras in there. I remove the shoe case from the top of the bag, cram it with tape, extra soles/heels, and whatever other accessories I'll need, and place that in my carry on. I always weigh my stuff out ahead of time, and, as stated, it's always right at the edge of 50.
Now, one thing to always be aware of is that the scale was zeroed out before your stuff is placed on it. I had that happen to me last year or the year before. My stuff weighed in at something like 53.5lbs when it was weighing in at 50.0 or just under at home. It turned out the scale wasn't zeroed out from the previous passenger, so it started out more at 3+ pounds before I even put my stuff on there. Thankfully, I was polite, and the attendant noticed it, and everything worked out fine.
Like so many things in life, if you are polite and don't act like an entitled d-bag, they're often quite nice about those things. As soon as you start acting like a moron, you'd better have your credit card ready so you can be charged for the extra! lol