You dont even know what your true max is, maybe you were good for 10g more, or maybe you went too heavy by 100g, who really knows, it's not important for the purpose of training which is something you do all the time not just a once off event. What we are interested in as athletes is being able to perform at a decent high level regularly.
And that is exactly why you don't have to chase your true max every day, but a safe 90-95% is a wise choice. Anything over 85% is supposed to recruit all muscle units anyway.
Many ( if not most ) people in here train like that, going for a daily heavy -but not max- single, them back-off and do some rep work. kingfish, raptor, mutumbo, dreyth, ChrisM and so on. I did it too in my recent periodization routine ( in the strength phase, this was done to build strength, not preserve it ), here is kellyb's guidelines:
Squat: 8 x 1 @ 90% (add weight the 1st 4-5 sets working up to heavy but solid form single. Reduce the weight by 10% and perform 3-4 more sets of 1)
If you love the PR, the true max, which you do, it is ok, go for it, just do it less often, like once a week or every 2 weeks. I bet that following the buffered approach will lead to better PRs when you go for them like that.
Just 2c again.