In 1966-67 in Gunsmithing school we were taught that this particular cartridge had blown up more Model 70's than any other round... by hand loaders trying to make it do what it can't... it's a weak little case and not designed for extreme pressure.
Seriously ... I can't see that case holding enough powder to blow up a model 70 action??
That's a lot of steel around that small case.
JJ
In 1966-67 in Gunsmithing school we were taught that this particular cartridge had blown up more Model 70's than any other round... by hand loaders trying to make it do what it can't... it's a weak little case and not designed for extreme pressure.
Seriously ... I can't see that case holding enough powder to blow up a model 70 action??
That's a lot of steel around that small case.
JJ
Seriously - the info was right from Winchester... it doesn't matter how much steel is there, when the unsupported thin brass lets go... the massive amount of steel funnels and concentrates the escaping gas... and thinner portions of steel can rupture. It occurs not because of an action weakness but a catastrophic case failure. It's easy to do in a very small weak case...
Looking at some literature from Hercules circa 1960, two loads for the Hornet are listed using 2400 and Unique, my guess is double charges of Unique are to blame.
You don't understand how pressure works inside a chamber...
The Hornet is a finicky little round and is prone to pressure spikes.... exacerbating the problem is that there are many versions of the Hornet.
OP.... that is a cool find... I have owned and shot many Hornets, but I have never even seen an M70 Hornet.
How would you get a double charge in the hornet case though? one charge of lil'gun pretty much fills case...2400 and Unique must be different consistency...???




























