I have many reloading books and I compare data from one book to another in working up loads. All of the books from Sierra, Hornady, Speer, etc. give barrel length data with the exception of the Lee 2nd Edition. So I wrote them and asked what barrel lenght was used in the 308 data.
They responded with, "All of the data we get is re-published from the major powder manufacturers. They may have barrel length factored into their calculations. Please contact them directly. Barrel length has no impact on pressure, all loads listed are safe for use in all lengths of barrels."
Apparently all of the chapters devoted to pressure and Richard Lee's observations are based upon the powder manufacturer's testing. At least this is exactly what was written in the Lee email response. I think I'll be using other reloading data books in the future or just simply search the powder manufacturers on the web. Why pay the money for republished data?
They responded with, "All of the data we get is re-published from the major powder manufacturers. They may have barrel length factored into their calculations. Please contact them directly. Barrel length has no impact on pressure, all loads listed are safe for use in all lengths of barrels."
Apparently all of the chapters devoted to pressure and Richard Lee's observations are based upon the powder manufacturer's testing. At least this is exactly what was written in the Lee email response. I think I'll be using other reloading data books in the future or just simply search the powder manufacturers on the web. Why pay the money for republished data?