Originally Posted by 9372
The barrel twist is one turn per barrel long 62,5cm, so around 1:24,6 inch, I cant find any info about this twist rate in 9,3mm bore and for what bullet weights/speed it meant to be. Range of bullets for 9,3x57r/360 were between 124gr to 227gr..Any ideas? Thank you

There are a number of on-line calculators for Greenhill's formula. Most of them use known inputs to calculate the proper twist. A bit of fiddling and one can use them to work towards any of the variables.

Example => https://www.vcalc.com/wiki/AndrewBudd/Greenhill+Formula+for+Optimal+Rifling+Twist+Rate