To answer the original question, there is no reason you cannot re-use pry-off bottles. I have been using those and also the crown type that are a twist-off cap, too. I have never, ever, had a problem with either type. Sometimes the screwoff bottles will feel different when you crimp down the cap with your capper, but they seal perfectly.
Don't let anyone tell you that regular nonreturnable bottles are not good enough.