Yeah, I had done 12, 10, 8, 8, 6 (close to failure) at 275 with spring collars before the 1RM later in the day. I should have just warmed up with some reps at 225. I am not stating that I could have done more, but it wasn't smart. I got a new Ivanko SS bar and I love the knurl.
Edit. It was 255.