Yeah doing it in the gym in your ideal setting/timing/music people around you (or alone if you hate pressure) is very different from putting up a total in the same day in less than ideal conditions like sharing different warmup equipment than what your attempts will be on, being told exactly when to lift, no control over temperatures, being in front of a crowd, lifting to commands and being judged is a big one.
It’s very common for the total of your gym bests to exceed your best successful total.
I'm sure it's much harder doing it all in the same day, i personally don't know what ideal conditions would be for me. I definitely would need ppl watching me so I feel like I need to do it, probably no music because I'm use to listening to podcasts while I lift lol.
I wish I had a group of powerlifters around me so I could dedicate a training period specifically to the big 3. I've never really done that since my first year or 2 lifting. I've looked hi and low and there's no powerlifting gyms or groups in my area. I'm still bouncing between my basement gym and a planet fitness right now unfortunately. Anywho, congrats on the numbers and the house, I'm in the process of gutting and remodeling a kitchen, bathroom and bedroom right now, then gotta paint the whole place and put floors in hopefully all before October 1st and move in. It's a nightmare lol