Thread: Aftermarket R93 and R8 Barrels – Major Safety Concerns

who made the barrel and or fitting work?

Originally Posted by Tussock

Lets not answer that. Based on L.Rs response is should be possible to guess.

+1 There are plenty of questions that need to be asked. It is imo however, a good saftey plug for Blaser, in a way.
If a chamber can expand that much on a single firing, yet the primary locking of the action remains intact. Impressive.

I also think it is really poor form displayed by the owner of said barrel, to run somewhere else for answers before giving the fabricator of the barrel a chance to fault find and remedy. I would be highly pissed if I was the fabricator assuming he has not been given the chance.

Headspace is critical and has to be absolutely perfect for these actions to remain safe and function correctly. More so than a sloppy standard action
You will reach your max load well before you would in a standard camming action. So in order to have a functioning rifle you can never use overloaded ammo.
Primary extraction cannot be achieved unless it is well within safe limits. You normally have to increase barrel length if you chase the speed others get from the same cal in a standard action.

I would be putting the load used at the top of the fault list in this instance. If that is deemed to be safe......then look at the metals, tolerances and fabrication process.

Originally Posted by R93

+1 There are plenty of questions that need to be asked...

I would be putting the load used at the top of the fault list in this instance. If that is deemed to be safe......then look at the metals, tolerances and fabrication process.

End of the day, a wildcat load has no specs...
Metal, tolerance and fabrication process has no controls over either, and thus the issue we have in NZ with every backyarder thinking they are a gunsmith and no accountability and in most accounts no metallurgy experience and basic/limited machine skills and tools.
Primary extraction as a quote is understood by very few, and it seems that many also struggle with the basics of headspace

Who's barrel is it, who made the action and what's being done about it??

Originally Posted by Spanners

Primary extraction as a quote is understood by very few, and it seems that many also struggle with the basics of headspace

Basics of gunsmithing I would have thought. Or was I wrong to mention them because no one knows what they mean?

Originally Posted by R93

Basics of gunsmithing I would have thought. Or was I wrong to mention them because no one knows what they mean?

Yes the basics and as I said, many don't actually 'get it'