I might have made some progress. Nothing was making any sense.
Instead of cleaning the bolt with solvents and brushes I tried it with Jb paste, then flushed it with brake cleaner.
No misfires with 10 rds factory loads.
3 out of 4 misfires with full length resizing using the same brass and seating the primers in as far as possible.
1 out of 5 misfired with neck sized brass.
Since factory brass is fl resized and worked , why isn't mine? I can see where the sizing stopped and it doesn't look like it pushed the shoulder back.
Would carb cleaner damage the bolt?
I will get some more factory loads and see what happens.
I use a Lee priming tool so can't be contaminated. Tried several. Rands of primers with same result.
The indents look ok. I'm assuming the cartridge cases are dry and clean, inside and out. Were the cases washed? Lubed prior to seating primers? if the factory loads go off 100%, and your reloads don't, it's something you may be doing.
Team 1894 #288
Team Winchester #134
Marlin League #145
Team Enfield #1
Team Revolver #99
No wash, just lubes, size, wipe. Prime.
If the indents were always like them probably no misfires. Misfires due to light strikes