Quote Originally Posted by englishman_ca View Post
To convert to 410, the rifle would need to have a barrel change. With a replacement 303 barrel bored out to 410. Many muskets (shot guns) retained the magazine as a loading platform and were used as single loaders. I don't think that anything had to be done to the bolt.

So by my thinking, to convert such a 410 musket back into a 303 rifle, all that would be needed was another barrel change.

The 410 marking looks to be officially canceled with the 'propeller' mark.

There are some old Sht.LEs out there converted to 410 and then converted again to 22 rimfire.
Interesting things happen in India.
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 UKicon you 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.