Tim,

Thanks for the details. The addition of the Interlock ring occurred in the 1980s, so your Hornadys were all Interlocks.

Which is why I started using even more Hornady Spire Points in the 80s. They not only expanded and held together reliably at moderate velocities, but at well over 3000 fps.

“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.”
John Steinbeck