Ben,
2lbs is really on the edge. For a top of the line trigger such as a Jewel, I would say absolutely. For a middle of the road trigger like the Timney, I personally would not use it. For varmint shooting I would either get a better quality trigger with that weight of pull or I would get a lighter trigger.
The most important aspect here of course is safety. Specifically, I personally would never use a trigger at the absolute minimum weight it is rated for...that is just an accident waiting to happen in my opinion. More than likely you will run a very serious risk of encountering slam fires with that trigger if you use it at its absolute minimum suggested weight of pull setting.
JRH
