I don't think the screw knew if it was a PR3 or Dunlap.
I will dismount the tire, make an internal repair so I have it done right and SEE the inside of the tire. I have driven home on plugs many times. Then its a proper repair from inside. Once the tire carcass was ruined from a bent piece of wire. If I just plugged the tire, It would have gone flat in no time. I had to throw that tire out after 1200 miles.
That was the original Dunlap that came on the bike. That day I could only find a tire at the dealer I bought the bike and the replacement was OEM Dunlap.
I ran that one for 5,000 miles and replaced it with a PR3 which is worn after 6,000 miles. It will get another PR3.