Sorry, I don't. The guns I had that were ported with this method were all stolen 10 years ago.
It's simple though. Just use a 60 deg included angle champher drill, single flute, high speed and be sure it's a good sharp one. Don't buy cheapies. I don't remember if I told it before, but I filled the bore with cerro safe and allowed it to swell for the prescribed time so it was real tight in the bore, then kept the drill well cooled with water mixed with soluable cutting oil. Turn the drill slowly and use light feed pressure. Just enough to make it cut smoothly. All the above is to minimize pushing a bump into the barrel, around the port hole. Melt the cerro out when finished.
I put a row of ports at about 30 deg right and left of top dead center, started just behind the front sight ramp. 4 ports on each side worked well with the revolvers I did. If you start farther back on a rifle, which will mostly have thicker barrels than revolvers, say 6 inches back from the muzzle, try only two ports on a side to start. Add one on a side, at a time, if needed. Keep the hole close as possible to .1 inch where it breaks through. You'll need a 5/16 diameter champher drill for thick rifle barrels, while 1/4 inch diameter is large enough for the handguns I did. Smaller ones cut better down on the tip than larger.
If you have access to an EDM machine, by all means use it, don't drill.
