9x19 in 7,63x25 chamber

unspellable · 01-09-2009, 08:49 PM

Stress on the bolt retainer and rear of the receiver is determined by bolt velocity, which in turn is determined by impulse, not pressure in an otherwise sound C96. The chrono velocity listed above is in the ballpark so I don't think it's a problem. The C96 is basically a strong design so pressure running a tad spiffy won't really hurt.

The real problem with catastrophic failure in a C96 is the hazards that come with old age. Bolt retainers and the retainer hole in the receiver have been known to crack as shown above. The locking lugs will become rounded with mileage, allowing unlocking to occur a bit early which will tend to raise bolt velocity. There is a fix for the last problem.

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01-09-2009, 08:49 PM	#32
unspellable User Join Date: Jun 2002 Location: Iowa Posts: 769 Thanks: 0 Thanked 20 Times in 12 Posts	Stress on the bolt retainer and rear of the receiver is determined by bolt velocity, which in turn is determined by impulse, not pressure in an otherwise sound C96. The chrono velocity listed above is in the ballpark so I don't think it's a problem. The C96 is basically a strong design so pressure running a tad spiffy won't really hurt. The real problem with catastrophic failure in a C96 is the hazards that come with old age. Bolt retainers and the retainer hole in the receiver have been known to crack as shown above. The locking lugs will become rounded with mileage, allowing unlocking to occur a bit early which will tend to raise bolt velocity. There is a fix for the last problem.