OK, as mentioned: did trim the nose and chamber the edges of the hook per @theraptur
's original efforts - and that certainly helped. Still not thrilled by the height above rim, or about the cant of the case to breechface, but to carry on..
The first step is to bend the extractor just enough to get the locating pad to make contact with the inner wall of the extractor tunnel.
Well, this is the original extractor - so whatever bend it has is "stock" - where
along the length of the thing are you bending? (and I assume a vise here, cuz I can't get the bugger to flex by hand at all ;-)
I'm not even sure it IS impacting the inner tunnel-wall - I'd expect to see streaks from abrasion.
2a. The hook must be in the prescribed range of .075" to .085" aka Hook To Breech Distance. Too tight (<.075") and the case rim can have trouble getting under the hook and cause a jam. Too big (>.085") and there is a loss of control, the case can "rattle" around under the hook and not be controlled, erratic ejection, stovepipe jam, etc.
OK, so here is where I need something - like a washer, (or like those round plug-gap widgets) which actually can simulate a RIM and has to be >.075" <.086" thick. It doesn't measure anything but the hook-height-above-breech.
(I may unleash lil'bro and his machinist-leanings on this). This is related to Steve's image here.
, from his Sticky.
Once contact is established you can insert the gauge to see if it will make solid contact with the left guide block while at the same time making very light contact with the tensioning wall.
OK, now - this is the other washer-like gage
, right? Leading up to @theraptur
's drawing here
. That's all based on the SAAMI and reality of the rim diameter, right? (as much Experience as Blueprints)
The inner hump/pad is there to stop the extractor from getting closer to the centerpine/FP, right? BUT, we are bending the extractor INWARD for tension? (again where) - and the DEFLECTION is the distance the extractor moves outward from centerline? Meaning that either the outer hump.pad is NOT in contact with the tunnel, OR we are literally putting tension on the extractor between the humps/pads and the hook? (That seems like a lot of force).
In the 2nd image of Steve's Sticky, here
, it looks like there is an "at rest" position for the extractor as well. Dunno what it is supposed to be - does it matter? Is that only controlled by The Bend? (until we get to filing the inner pad?)
I'm sure I sound nutso, but I am trying to get to understanding this before I get a hammer and a beltsander ;-)