M10 Ross Extractor Groove Pin in Bolt Head / Any way to tighten windage plate

[hatrick]

I just picked up a beautiful Toronto Home Guard M10 Ross and it has an odd pin in the extractor groove and I have never seen this before. Anyone know about his and if it is safe to fire?


Also, the wingdage plate thumbscrew is extremely easy to turn and I was wondering if there is any way to tighten this?


Attachment 58888

Thanks,
Eric

Information

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[oldpaul]

In 1914 the SSAC (Standing Small Arms Committee) ordered some changes made on the MkIII before the rifle was "sealed". One of these changes was to shorten the bolt head extractor groove. These changes were made in late 1915. The photo, of the photo, from TRRS shows the progression from the original long groove to a modification with a pin to make original bolt heads comply and on the right, the final version. You have the middle version and mine is the final one. As to your loose sight: I have four of these rear sights in seemingly new condition plus the one on my rifle and on all but one the windage plates and screws move too easily. My solution for this was to correct for windage at the range with my normal reloads and then put a drop of loctite on one side of the threads on the adjuster thumbscrew. Regards. Tom

[boltaction]

Any chance of some photos of the whole rifle? I'm always into Ross porn.

Ed

[Surpmil]

The pin was insterted to prevent the bolt head being flipped into a potentially unsafe location without the bolt being disassembled. "Potentially unsafe" because the vast majority of rifles will not accept a bolt in the unsafe position, but for whatever reasons, some will.