If it isn't limp wristing, can't hurt to polish the feed ramp. Get a pack of assorted fine sand paper. Start with piece of 400 wrapped around a pencil eraser to polish up and down the feed ramp. Do the whole width of the feed ramp, not just the middle. I use WD40 for lube. After that, clean and move on to 1000. I stop there but hitting it with even finer paper will polish it out more. Some use a dremel, I prefer to do it manually.