420# is a great pull with the 3″ bar!!! That’s nothing to be ashamed of! Training with the 3″ bar presents challenges that don’t exist with a regular bar. On top of the grip being much more difficult, the 3″ bar forces the body into different body positions that are not optimal. Like with the deadlift, you will notice that the 3″ bar forces the body to pull in a line that is not straight. You will be slightly rotated toward the direction of your undergrip.
I was very pleased with my 3″ bar deadlift, but it is far from the overall record and best lift in the USAWA. Matt Graham pulled 600# on a 3″ bar several years ago at Kevin Fultons Supergrip challenge. That same day he had a close miss at 640#!!! I have a picture somewhere of that lift of his – and now I’m going to look for it!!!! Dinoman