Mornin Tony,
As for polishing the feed ramp, I was told on another Bersa forum to never polishing the feed ramp as it would ruin the weapon, which is BS. If it's not feeding and you send it in to an authorize gun smith, that's the first thing they do to it. My 9 UC was not feeding (one of the problems) when I first got it back in 2012. I polished mine and it's been working ever since, and I shoot a lot. Keep in mind now that a "authorize gun smith" is just that, nothing more. They work on any brand of weapon that comes through the door, and they're not all good at what they do. I work on my own weapons.
In your post you said it was misfiring and that you only had a couple of misfires, that's a different problem.
Mine started to misfire a while back because I believe I had powder build up behind the firing pin. I solved that problem this way. I use WD-40 to clean all my weapons and have for years. I do strongly recommend to use an air compressor to blow all the black and WD-40 out and off the weapon so you won't have any build up on them. (I haven't found anything that can clean black powder faster or better then WD-40) I do lightly oil them after they are clean.
As for polishing the feed ramp, I was told on another Bersa forum to never polishing the feed ramp as it would ruin the weapon, which is BS. If it's not feeding and you send it in to an authorize gun smith, that's the first thing they do to it. My 9 UC was not feeding (one of the problems) when I first got it back in 2012. I polished mine and it's been working ever since, and I shoot a lot. Keep in mind now that a "authorize gun smith" is just that, nothing more. They work on any brand of weapon that comes through the door, and they're not all good at what they do. I work on my own weapons.
In your post you said it was misfiring and that you only had a couple of misfires, that's a different problem.
Mine started to misfire a while back because I believe I had powder build up behind the firing pin. I solved that problem this way. I use WD-40 to clean all my weapons and have for years. I do strongly recommend to use an air compressor to blow all the black and WD-40 out and off the weapon so you won't have any build up on them. (I haven't found anything that can clean black powder faster or better then WD-40) I do lightly oil them after they are clean.