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I no longer have the option to edit the post on the SMLE bolt head overturn, so a bit out of sequence but some more information :



There is indeed a 'bolt head overturn gauge' listed in the...

I'm beginning to wish I'd never started - I'm now lost deep inside the rabbit hole metropolis and I didn't leave a trail of crumbs to find my way out.

I now find that there were actually dummy...

Duplicate post.

I have spoken with DS solutions asking if he could give me a source for the figure of 7-degrees max overturn for the SMLE.

He is not aware of any documentary evidence where this has been stated,...

I wonder where the manufacturers of the repro tool got that from ?

They go on to explain about fitting a 'longer' bolt head (either getting a used one out of the armourers drawer (used bolt heads did not count as a stock requisition) or get a new bolt head and grind...

The 1912 and 1931 "Instructions to Armourers" do not appear to quote an acceptable displacement of the bolt head in relation to the bolt - except for -


4. Action:—Bolt and bolt-head.

(i)...

i know, but it occurred to me that it may be similar to bolt head sizing / headspace where the Manufacturer and the Base workshops MUST get it to headspace with a No2 bolt head - a No3 bolt head was...

And in many of the manuals is quoted as 20° and that is the dimension picked up and published in the Canadian manuals.

I wonder if the 16° was the maximum that Armourers were allowed to accept...

1) Moving the bolt head forward means the striker will now not be long enough.

2) It is very poor engineering practice.

3) The official answer is :"If headpsace cannot be achieved using...