This is the 12342nd most frequent Russian word.
калибром
"Калибром" is the instrumental case of "калибр," meaning "caliber" or "gauge."
In this sentence, калибром refers to a tool, specifically a gauge, used for measuring or sizing.
Этот станок оснащён сверлом диаметром десять миллиметров и калибром для точного измерения.
This machine is equipped with a drill bit of ten millimeters in diameter and a gauge for precise measurement.
Here, калибром is used to refer to the diameter or size specification of coins.
Говоря о коллекции монет, он упомянул рубли времён Петра Великого с калибром идентичным современному стандарту.
Speaking about the collection of coins, he mentioned rubles from the times of Peter the Great with a caliber identical to the modern standard.
In this context, калибром indicates the bore diameter of the firearm barrel or the corresponding ammunition size.