I am fairly sure that there are no changes required to the bolt, bolt head or extractor Simply just a barrel change and sort out headspace.
I can swap over '303' bolts into my 410 without any problem.
In the UKyou cannot have spare bolts bolt heads or barrels for a firearm (rifle) without Police permission and having them listed on your certificate, but, you can for a shotgun.
It is simply coincidence that they are interchangeable.Information
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