Originally Posted By: prairie ghost
You might consider posting over on Nitro Express.com as well. A wealth of info and very experienced double rifle shooters frequent that site. Graham Wright's books may shed some light on the subject.

Hi Prairie. I have read Graeme's book many times, because I shoot so many rifles in different calibers that the book really is a necessity. Unfortunately, while the information the book has about the 450/400 3-1/4" round is pretty good, it does not have anything about bullet diameter. Thanks for the suggestion about NitroX. I have posted over at NitroX and I am due for another visit.

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