I ran into the old front lock screw in the ramrod hole thing again. I found a solution. I made a scraper from a scrap piece of stainless rod 5/16" by 48".
By beating a lip on the end then doing some grinding and filing to shape and sharpen the cutter and taper it opposite the cutter I made a scraper to open up the hole before and after the screw so it will accept a 3/8" rod full depth.
Once the scraper is made bend the rod about 2"-3" back of the cutter to make it tight in the hole.
If you over do this it may not go through the pipes or will be too aggressive and if too straight it will not cut. Took 4-5 tries at straightening/bending and some slight filing of the cutting edge to get it the right size, once right it will not cut too much and jam (be careful) but will scrape out the hole. mark the "up" side so you can rotate it as you scrape to make the hole wider and deeper.
Will also scrape away any misalignment at the entry pipe. It will also scrape the rod channel so keep the cutting edge "up" as its inserted and removed.
I first tried simply beating it on the side to enlarge it but bending was required to get the fit right. Chips will pack in the bottom of the hole but a rod hole drill or sharpening the other end of the scraper rod to a flat point will clean these out.
Once the rod was done it only took a few minutes and some of that was getting the scrapings out of the hole.
This is 303 stainless so a piece of hot or cold rolled would work just as well unhardened.
Of course before scraping make sure you have enough wood. This stock did.
Dan