While not surplus, Sellier & Bellot .303 (new) FMJ has shot well for me, over 400 rounds worth ranging from 100-1,000 yards and stayed "true" to the sight elevation ladder on my No.4 Mk1. The 7.92mm worked well in my father's WW1 Mauser as well.

If you gotta buy new, using S&B isn't bad.