Thread: 7mm-08 reloads extraction issue - thoughts please

Greetings @Jhon and all,
I am with @No.3 with the need to have brass with the same headstamp and round count, preferably of the same batch. From my notes the Sako brass is about 10 grains heavier than the Winchester so should develop a little more velocity and pressure. The Hornady brass was about the same weight as Win. Another thing to include in your next range session would be to chronograph your test loads which would give you a better understanding of how pressure is related to the problem.
The interesting thing with handloading is that you more you learn the more profound your ignorance seems to become, at least it was that way for me. It is now over 50 years since I loaded my first cartridge and I am still learning. Stick with it.
Regards Grandpamac.
PS. Almost 50 years ago I almost tossed my handloading kit out of the cot. I was having endless problems loading for the .303. After I got my first .308 I vowed never to load another .303 round in my life. Today there are .303 rifles in the cabinet and I loads for them happily. Perhaps I have learned something in the years between.