Assuming you mean a Brno 602, it will depend on the caliber that the rifle is made in. Brno 602 is a make and model, not caliber.
602
Mine says jub 11 602
602 + 1000 = 1602
602 = DCII
602 = DCII
The factors of 602 are: 1, 2, 7, 14, 43, 86, 301, and 602.The prime factors of 602 are: 2, 7, and 43.
It is: 602*57 = 34,314
301
12÷ 1/3
The positive integer factors of 602 are: 1, 2, 7, 14, 43, 86, 301, 602
602 fathoms = 3,612 feet