Letters
Mar 13, 2020
3 minutes
Overbore Cartridges
I enjoyed the article regarding overbore cartridges by Roger Ingle in your February 2020 edition.
It is indeed true, the ratio of case volume (or mass of propellant) in comparison with the cross-sectional area of the bore is a huge sinner in so far as bore erosion is concerned.
There is however a third major contributor to bore erosion that is often overlooked. It almost seems counter intuitive, but the contribution added by the sectional density (SD) of the bullet is
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