In South Africa we have an Afrikaans expression: "Slim vang sy baas" - literally translated " Clever catches it's (his) boss". This is just a comment to maybe remind us that we need to try to match certain techniques with certain shortcomings in our equipment / skill etc. Not to suggest that we accept anything less that perfect though, but to try to match the processes. I rate my reloading skills as above average (learnt a bunch here, thank you!). I use the "better equipment" and "tools" that I can afford and try to keep learning and reading as I go. My results are generally pretty good and I'm probably even a little too compulsive about some of the things that I do in the loading process. I've not been able to get a run out gauge here and have a friend making me one - that will no doubt answer many questions, and give rise to a bunch that I'll ask here, but that's a thread for another time. Anyhow, the point is that I bought a Wilson 30° uniform inside deburring cutter. All good and I like the trimmer very much. I neck sized some 3 times fired cases in a Redding bushing neck die. Trimmed on the Wilson and went to work inside deburring. Cases are sorted Winnie (.300 WM) with less than .002" neck thickness variance. Imagine my surprise to find that the cut of the chamfer was totally uneven (I'd love to blame the tool), implying to me that the necks are out of alignment (I'd think). So I'm cutting around a different axis to where the neck is centred; tool centre and neck centre don't co-incide. This means that the bullet release will likely be less consistent than with my previous hand turned de-burrer. I suppose that at that angle the 2 thou neck thickness variation can make a bit of a visible difference - but not this much. Just a thought - the inconsistencies in certain processes may be treated in a less foregiving fashion by certain precision tools - in fact I guess you may be worse off. Sure, I now know that there's a problem that I suspected anyway, but that's another point altogether. Expect a bunch of run out questions shortly!