Just checking out some top loads for the 270, with 130 grain bullets, back in the hay day of shooting, with war surplus powder, called 4350 data powder, because no data was out for the surplus powder, and using loading data for 4350 powder, gave respectable and safe loads.
Jack O'Connor figured out that 60 grains of the war surplus powder was about top of the line loading and by the time Bruce Hodgdon had precise figures for the powder, the world was using the O'Connor load and nothing Hodgdon could do would change world opinion! The O'Connor load, 60 grains of the war surplus powder, was about as good as it gets for the 270.
I'm looking at my old notes on my loading and I got just about 3,000 feet per second with a 130 grain bullet, in my Sako with a 24 inch barrel, with the surplus powder, as recorded by an Oehler 33 chronograph.
As point of interest, I still have a bit of the old original surplus powder and within the last two or three years, I have loaded it, with the old original loadings, in two different calibres, the 270 and a 243 and each rifle performed exactly as they did in the 1950s, with that powder.
Modern loading manuals will show loads that are in the order of 200, to 300 feet per second slower than that, despite the fact their figures will be about the same as the old loads.
Jack O'Connor figured out that 60 grains of the war surplus powder was about top of the line loading and by the time Bruce Hodgdon had precise figures for the powder, the world was using the O'Connor load and nothing Hodgdon could do would change world opinion! The O'Connor load, 60 grains of the war surplus powder, was about as good as it gets for the 270.
I'm looking at my old notes on my loading and I got just about 3,000 feet per second with a 130 grain bullet, in my Sako with a 24 inch barrel, with the surplus powder, as recorded by an Oehler 33 chronograph.
As point of interest, I still have a bit of the old original surplus powder and within the last two or three years, I have loaded it, with the old original loadings, in two different calibres, the 270 and a 243 and each rifle performed exactly as they did in the 1950s, with that powder.
Modern loading manuals will show loads that are in the order of 200, to 300 feet per second slower than that, despite the fact their figures will be about the same as the old loads.
