Page 110 of TM 31-210 Improvised Munitions Handbook
Dept. of the Army Pub circa 1969 tells and shows you how
to reactivate boxer primers the old school way.
It also does show and tell for other stuff that can get you
into a lot of trouble. But it's nice to have as a reference
when watching Jack Ryan or reading Alistair Maclean or
living in interesting times.
Google link to some pages that have it:
tm 31-210 pdf - Google Search