I5 2500 Limited OC, safe?

Hi,

I'm an overclocking noobie, I have an i5 2500 (not the k version), which as I have read, has limited overclocking (3.3 to 3.8, ish?).

I have this heatsink:
Coolermaster Hyper 212 Plus Direct Touch 4 Heatpipe Heatsink AM2 AM3 LGA1366 LGA1155 LGA1156 120MM

Is running at 3.8 safe, or should I run somewhere in the middle, or not OC at all.

I know all overclocking has risks, I'm hoping to not shorten my CPU life 'too-much'.

I've really only found information on the unlocked version.

Thanks for any help.