Enfield No4 Mk2 bolt head ?

[Frederick]

At Century 200yd electronic yesterday. Fired 20 factory PPU 174 and 10 handload using 40g of n140 .

Everything went fine, nothing unusual, another great day shooting.

While cleaning my rifle I spun the bolt head a few turns . It felt gritty so I took it all the way off . It seems a small section of the thread has come away, see photo. 

It was very tight to screw back on so I didn't force it . Instead I gently used a fine needle file to smooth the jagged thread. It screws on now but still dosent feel as smooth as it used to . The striker protrudes .046 ( when in fired position) and the gap between the cocking shoe and bolt body is .053 , about perfect.

Had anyone had a similar experience? 

[Andrew]

Have a couple of dozen Lee's in many configurations and have seen a chip gone out of the threads before. Never caused any issues. Did you find the pieces? has your rifle been refinished?  Wouldn't the chipped area be expected to be bare grey metal? ~Andrew