Does cleaning brass cases help accuracy?

On new brass I do everything. I ream the flash hole with a tool made for the smaller PPC flash hole. I unify the primer pocket. I firearm the brass and trim the cases to 1.495". During a match I use a crazy cloth to clean the neck and, if I feel like it, the whole case. This includes the extractor groove and base of the case. I brush the inside of the neck with a nylon brush and clean the primer pocket. I remove the crazy cloth residue with a cloth or paper towel. I lube the case, FLR it and remove the lube. I prime the case and load the round. I trim the cases after one yardage. I do not ream the flash hole after the initial prep. After a match I punch out the used primer then tumble the cases with case cleaner and SS pins. I finally anneal the cases, FLR, trim them to uniform length, prime them and put them in my loading box for the next match. Is all of this necessary? I don't know but I have removed several variables I no longer have to worry about.
I shoot a .268" neck and turn my necks to give a loaded round with a FB bullet a diameter of .266". This gives .001" of clearance. I have tried tight neck clearance of .0005" or less. They work but with today's hot loads of 133 I occasionally get fliers from too hot of loads.
Call me anal and several have called me various colorful variations of this portion of human anatomy but as the saying goes "I gotta be me".
 
In my ideal world, dies and neck bushings would all be carbide and all chambers no turn. If I didn't have a ton of prepped cases, I would start over and go no turn.
 
My cases only have soot on the necks and the primer pockets. Both of which are easily cleaned. I simply don't have time to run them through some kind of tumbler and either pick media out of the flash holes, or rinse them off and wait for them to dry. If it doesn't make processing my cases easier, or show a difference on target, I skip it. Running case through a tumbler ranks right up there with measuring primer heights, pocket depths, rim thickness, and counting individual carpet fibers as complete wastes of time imho.
 
Nor Cal Mikie said:
Keeping brass clean sure helps NOT gouging your chamber. Once gouged, you're done!! :eek:
Best to stay after it from day one.;)
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You would scratch your die first. A friend did this. He was not mechanically inclined. Missed the part about wiping your 6PPC brass off with a cloth. I use wash clothes. Wash them 3-4 times to be softer than new. Then apply die wax. Then wipe off again. His die and chambers were scratched.
 
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