Tonight was "DLT" (dead lift thursday).

Normally, this is my dead lift profile:
135 x 8
185 x 8
225 x 6
275 x 6
315 x 6 <-- I've only pulled 315 two or three times for six reps.


Tonight:
135 x 8
185 x 8
225 x 4
275 x 4
315 x 4
335 x 6


So is that 335 x 6 a legit PR, or is that just me conserving energy before hand?