I personally play this artillery with 152mm BR-2 Gun. Same situation as with SU-14-1. I think the best cannon is not the best solution. Of course who likes to enjoy the big gun 203mm B-4, let him try and see for himself if I'm right. But when he misses a couple of times in a row, and the reloading time is 40 seconds, he will accept my advice. Mobility is very poor. One of the slowest artillery. So don't expect much from this artillery.
This is a proposed field modification from skill4ltu for S-51.
Skill4ltu's note: Doctor_Nix™ approved
Hunter S Suite
Hunter C Suite
Hydraulics Tuning (Setup 1)
Hydraulics Tuning (Setup 2)
Changes to technical characteristics
Dispersion during movement and on hull traverse
Concealment after firing a shot
Dispersion on hull traverse
Dispersion on gun traverse
Dispersion on gun traverse (bonus of Standard Modifications)
Accuracy (bonus of Standard Modifications)