Breech Bolt Replacement for Webley Vulcan and Hawk

[greenwayjames]

Just found a bolt/nut from a BSA Mercury-S which might work, either with a collared nut or by countersinking the breech jaws a bit. It is a loose fit in a HW35 breech block, so the HW bolts must be 7mm not 6.35 mm, and would need the breech block to be drilled....

The BSA bolt is too short so I've ordered a shouldered bolt off the evil bae...

Bowket used to include a bolt in his 12 ft/lbs Meteor conversions (£23.50 in the early 1980s) and also offer them fro Wobleys. He copied the HW system by threading one jaw and boring out the other. The bolt he made had a 7mm shank and the breech block/barrel bored out to suit. The HW system with locking screw or nut is the way to go. An unlocked bolt can turn around in use giving a cam effect which alters zero. I know this to be factual as I used one for many a year. Wish I still had it.

[Hsing-ee]

The HW system with locking screw or nut is the way to go. An unlocked bolt can turn around in use giving a cam effect which alters zero.

Blimey this is getting complicated. Maybe it would be better to just squeeze the breech jaws in a vice every so often!

[PCPShooter]

Blimey this is getting complicated. Maybe it would be better to just squeeze the breech jaws in a vice every so often!

Or use shims
Bolts don’t work on non central axis pivots
IMO a rifle with that conversion becomes valued at worth of other spare parts only-

[Hsing-ee]

Or use shims
Bolts don’t work on non central axis pivots
IMO a rifle with that conversion becomes valued at worth of other spare parts only-

It's a Hawk Mk 3 so its only worth a couple of Kit-Kats anyway.

I still don't understand why a non-central axis pivot cannot be fitted with bolt, can you explain?

[HW777]

It's a Hawk Mk 3 so its only worth a couple of Kit-Kats anyway.

I still don't understand why a non-central axis pivot cannot be fitted with bolt, can you explain?

If Steve pope said it can't be done, who are we to argue.

[Hsing-ee]

If Steve pope said it can't be done, who are we to argue.

I'm sure he didn't say 'it can't be done' because as an engineer he knows that it can, I just want to know why it is a bad idea. I cannot see how it would pull the jaws apart. Can anyone explain?

[junglie]

I'm sure he didn't say 'it can't be done' because as an engineer he knows that it can, I just want to know why it is a bad idea. I cannot see how it would pull the jaws apart. Can anyone explain?

My guess is if the pivot hole isn't exactly in the centre of the circle made by the jaws when viewed from end on then tightning it will close the bottom half of the circle & open the top if you get my drift?