SD43 Power Reserve Question

[spurwar]

Hi All,

I bought an SD 43 several months ago and noticed that the power reserve is much lower than what is typically expected for the movement (I'm seeing about 50-55 hours). I have a couple of questions for the forum:

1) Is there a typical variance that I can expect for the power reserve and what is that variance?

2) Is this a significant enough variance that warrants sending back to Rolex for correction?

Thanks in advance for your responses.