bottle carbing with 3 volumes CO2...

I've read some people carbonate with up to 4 volumes of CO2 in beer bottles. I've got Sierra Nevada bottles (reused once) and brand new bottles of unknown type from the LHBS. All of them seem like they are good condition.

I have a dopple weisenbock that I'd like to carb to 3 volumes of CO2. I can't afford to have bottle bombs (almost literally).

I want the most sage advice out there. Pretend you're me and your SWIMBO is just waiting for a bottle bomb to destroy your hobby.

Three vols is generally considered to be the safe limit. I recently carbed one up to abut 4 vols (didn't do my homework, shame on me) and no bombs yet, but that batch scares me a little. You're good with three vols.