Hi Raimey,
The LR primers from Ginex are 1.5 thou oversize so are very tight in normal boxer openings which might help with the reworked berdans.
Best wishes Martin
Old Austrian 6,5x70R rounds from Georg Roth might be be convertible this way, because they had a single central Berdan flashhole within the anvil. Not the usual two Berdan holes to either side of the anvil.
German 6,5x70R rounds will have the usual and well-known Berdan configuration. A drilled third hole for Boxer primers, already never unproblematic as such, here is an especially problematic idea for this round, because all the extant old cases are now over 60 years old, and the "Blue Bible" - Bavarian Brit knows it - warns especially against observed age hardening of the brass and lots of cracked cases (already 35 years ago !), even while reloaded with normal Berdan primers. A crack in the case bottom is not a good idea in any combined weapon, and may easily damage the lockwork.
Carcano
