458Lott
Thanks for the input I was looking at some reloading data and that is where I got some idea of velocity in a rifle.
Data was a 400 gr cast(lee) mold 7.5 inch barrel and 22 grs. H-110 for 1365fps.I was thinking it would be 400 faster in a 20 inch barrel, but I guess not: not too familiar with the heavy stuff. Thanks. Cheers NC
It is my understanding that if you have a unit that handles the 475 that you can shoot the 480 in same gun? Am I correct?

Last edited by northcountry; 10/08/14.

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