The problem is that people doing this aren't scrubbing original bases anymore they are using new blanks and stamping them. Take PIA for example their old stuff, scrubbed. The current stuff obviously new bases. They even took a pic (accidentally) of a blank base with one of their simson's before it was numbered.If you pulled the overall percentage of matching HK mags from the HK list, you would be working with adulterated data. MANY HK matching mags are said to be matching because the number on the mag bottom matches the number on the frame.
Maybe a better way to describe all of this would be to look for 'original' magazines. So many of today's mags are actually 'matching', because someone scrubbed and stamped a new number.
'Original' mags are easy to spot. They are not compromised in any way.
Scrubbed and stamped 'matching' mags are easy to spot. They look like contraband crap.
Look for the percentage of 'original' mags. It will be a far lower percentage than 'matching' mags
Seeing what has been passed in sales as 'matching' over the years, my guess is less than 15% of HK mags are actually 'original'.