First time benching 315 in 2 years

Since my back injury 2 years ago I have not gone heavy benching (or heavy anything) as I have instability which when I tried to push heavier weight would result in breaking form and hurting myself and sometimes lower back spasms. I fractured my spine and had 3 injured disks. 2-buldging and 1-displaced at L5-S1 pushing on my S1nerve.

For the last few years I have mostly benched 135 for reps and going up to 225 occasionally recently. I felt good tonight, so I put on 315 to see what it felt like. The first rep felt crushingly heavy, and then I had to mentally allow myself to push harder (a weird thing I have discovered when you dont train heavy for a while). My 'groove' was a little off, but all in all it felt ok.

Might start training a little progression, but just have to be careful. I could feel a slight tug in my back which happened on the second to last rep. That is why I did my last rep slowed down and decided to rack it there.

RAW lifts
635 Dead http://www.youtube.com/watch?v=mATRBZ0gwdg
585x7 Dead reps http://www.youtube.com/watch?v=6yf2ZkdNNNQ
420 Bench (paused) http://www.youtube.com/watch?v=MJ2_Q-TLIB8
535 Squat https://www.youtube.com/watch?v=kdgVaiTi4-8&feature=youtu.be