Nope. 'Sall true. Francois Tamisier obtained a patent in 1841 for multiple cannelures in bullets that Etinie Minie later used in the Minie Ball of our Civil War fame; though he made them for the Crimean War initially.

And Barnes uses multiple cannelures to allow the bullet to fit the bore better because copper solids don't compress like lead cored. If the bearing surface was straight parallel of standard diameters the pressure would spike when fired. Ask them. Though they don't give credit to the inventor. It's not like he's going to sue for patent infringement.

https://www.americanrifleman.org/art...ooved-bullets/