I hit 365x6, 6, & 5 last night (wrapless, obv) and I can squat into the low 4s right now I'm sure, easily. My training max is set at 455 right now. 405 is most certainly open to you any time you want it. Just do minimal, smart progressions, take a long rest, crank your knee wraps, jam out to heavy stuff and hit some ammonia. Easy as pie, no doubt. Barx5-10, 135x5, 225x5, 275x1, 315x1, 365x1, 405x1. 6 sets preceeding the attempt is all you need to prime the cns. Keep some pants on over your shorts til 405 since the warmup is so minimal, but this would be a competition style warmup for a lot of guys. Wrap for 365, but not 315.