I have valid visas in my old passport (it hasn't expired, just full... But the cover/info page did get 3 hole punched). I am traveling to Russia next week, and this is one of the valid visas that I have in my old passport.

Will I have issues crossing Russian immigration if I simply bring both passports? I have read so much conflicting information. The consulate and embassy were not helpful either, but I would not have time to transfer it to my current passport or apply for a new one.