Rifling Twists on SW99 barrels, one Right Handed and on Left Handed

[jmartinroe]

I have two SW99 40cal pistols. We I was cleaning them I noticed that the rifling was different on each barrel. One seems to have smoother lands than the other. Is this odd or normal that two barrels would been different? THis is just for info, not something to worry about.
Thanks,
Jeffrey

 

[semi-pro]

Sold mine years ago, regretted since