Re: HSM 270win. 150gr. Berger VLD
So I have the same issue when hand loading some 6.5 ammo. I pulled the bullet on one of the HSM trophy gold berger lines and it appears there are 2 different powders in the case unless my eyes deceive me. It is probably a propritery blend of powders. I do know some bullet manfactures will post volicity from a bullet and it will be shot out of a longer tube usually a 26 inch barrel. But with that being said I was able to get 3000 to 3020fps in a 24 inch 6.5 using the HSM. It also made my gun bolt somewhat tight when I was extracting the shell. So I pulled all the bullets and dumped the powder out. Using the brass. I am now shooting at around 2850fps and the gun shoots fine. I was chasing the speed thing as well. Best bet is try some the slower burning powders such as reloaders 25, H1000, retumbo. Also you might try the superformer powder by hodgens. Supposed to yield about 50-100fps faster. Just got to find load data though. I have been told that about 58 grains of retumbo in the 6.5x284 with a 26 inch barrel will yield 3000+ but have not tried it. Just my 2 cents.