| 400NitroExpress |
| (.400 member) |
| 25/10/09 04:31 AM |
Re: OSR, Double Damage and Barnes' Response
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Quote:
I do not think it is fair to categorically blame Barnes for their bullets in this sense. If the dimensions of their bullets are compatible with the internal dimension of the barrel shooting them, they'd be safe.
I can't agree with the above portion of your premise. As I told you, both of the rifles I referred to were slugged. The Barnes bullets used in both actually measured very slightly under groove diameter of the bores in both. OSR occurred quickly in both.
According to Barnes:
Quote:
"The material used to manufacture Barnes Banded Solids will not obturate at less than 45,000 psi."
No over .40 Flanged Nitro Express has a CIP MAP that high (save the .500/.416, which operates at 45,000 PSI with normal loads). So, we know that the bullet can't obturate, for two reasons. The material used is too hard, and there's no compressible core. Barnes says the bullets are slightly undersize, which I don't contest. That helps, but it can't be an answer. A hard .407" mono that has to pass down a .400" bore/.408" groove barrel still has a lot of metal to displace - metal that Barnes specifically states is difficult to displace - in order to conform to the bore. In the thin tubes of a double rifle, that's almost a guarantee of problems.