l believe Speer started bonding bullets with their HOT CORE process.
Visited Hornadys plant in Grand lsle Nebraska maybe 15 yrs ago.
Quite interesting watching machines being fed spools of lead
and strips of copper in one end and see bullets spit out
the other.. No smoke or steam rising tho from bonding/soldering.
Virtually the same setup at Noslers plant around 2002 also..
Really cool being there with three generations of Nosler Men..
Twas John Nosler's 90th birthday. l still have my souvenier
Nosler Manuel signed by all three gens of Noslers