Woo-hoo! Healthy skepticism... I like that.
I'm going to enjoy the "proof of concept" portion of this project a lot.
Bottom line guys... I'm and incurable, exceedingly anal retentive, tweeker from way back... My personal experience in loading for my pistol(s) is that ammunition consistency is a whole lot more important than anyone ever acknowledges.
Thus a few years ago, I took some "baby steps" to test some of my theories. At least two of them showed enough merit to "pursue with interest" (meaning: spend money on).
Unfortunately for these projects, I got "side-tracked"...
In any event, I am getting back to my shooting related R&D stuff, so hopefully (if nothing else) I'll be able to provide you guys with some interesting, thought-provoking stuff to discuss now and in the future.
Specifically, the toolhead clamp... I realize that the 550B was purpose designed the way it was, and it is IMHO a magnificent piece. However, I discovered that I could load more consistent pistol ammunition (physically AND balistically), if the tool head was "fixed" in place (properly, of course) using the clamp. I don't have my notes at hand right now, but I remember specifically that my last testing session proved that the "clamp" ammunition performance was significantly better than identical reloads w/o the clamp, in addition to being better than the factory loads I shot as a control.
The level of improvement was even better through my custom barrel design proto #1.
I'm awaiting the arrival of a bunch of materials and tooling, and am spending the day getting the shop organized (still have to build a proper reloading bench), but I should have something ready for testing soon. Accompanying the tests, I will write a paper detailing what happened and why... (e.g. The clamp "fixes" this, thus these "things" occur/no longer occur, thus producing more consistently loaded rounds, thus ultimately better performance ballistically....) (Or not, if I fail... )
Take care,