I have to agree with all before, but I am a little biased.
I wrote a western novel and contacted a publisher and followed all the instructions they suggested.
In the end, after much to-ing and fro-ing (and postal expense) they eventually rejected it!
Reason;- too technical description about the guns , handling and effects, and it was one long horse chase!!
The main premise of the story was a manhunt, what did they expect
Everyone at home who read it thought it was good, even non-western readers, but then again, I suppose they would!!
AE