Gary Roberts is very knowledgable and was one of the crew at LAIR, along with Marty Fackler.
Both were not only quite expert, but also just good, nice people and a pleasure to know and to speak with. I knew Gary very well but have, regretably, lost contact with him since both LAIR and the gun shop I worked at closed many years ago. I have many of Gary’s articles, and those from other members of the now-defunct IWBA (International Wound Ballistics Association) of which I was an associate member.
Your description points precisely to why the Sierra Matchking could not be counted on to expand at all. Basically, it was not designed to expand.
For match shooting, I don’t know why anyone would spend much time “uniforming” the bullet tips. I can’t think of his name, which is crazy since I own a case-neck uniformer that he actually made for himself, but one of the great benchrest shooters, and a fine tool and die maker in his own right, proved years ago that the bullet tip was much, much less important to accuracy than the base of the bullet was. I suppose if you are good enough to aspire to shooting that .000 group, you do everything you can, but some things that shooters do to try to achieve better accurace come under the definition of the law of diminishing returns. Not all things, of course.
The Sierra bullet, for a factory bullet, by the way, is a supreme projectile, and nothing anyone has said here diminishes the fact of its wonderful quality and performance for the purpose for which it is intended - target shooting. It is not a hunting bullet, nor sold as one.
Interesting stuff. I suppose a little off-topic for the IAA Forum, although I don’t see why since the subject is simply ammunition beyond the pretty painted tips and often confusing case types and definitions. I, myself, am mainly into the historical aspects of ammunition, but the tech side is just as important and interesting, and a real study of ammunition is pretty-much short-changed without it. Wish I had a place and the equipment to do my own testing.
Thanks for this discussion. I learned some things, of course. Always do. The combined expertise from you guys on this Forum is awesome, to say the least.