I don't know??? I believe it could be swaged just by firing it. What the results would be in terms of surviving launch, accuracy, or terminal performance is anybodies guess. The big question when we started was could a mono bullet, almost 2"'s long, be driven hard through an aggressive twist. That turned out to be the least of issues, but other issues appeared. Dynamic stability was one completely off my radar. Focussed on education and entertainment, and getting both. How a similar jacketed bullet would react adds another set of variables, probably best answered by those producing those bullets. The new Berger 6.5 will be fun watching others wring out. I'd be very interested in reading their notes over the last couple of years.