Depends on many factors - heat, temperature, humidity, powder, case style, etc, etc.
Of note, I use ONLY CCI 450 magnum primers in my 17 Rem, 204 Ruger, 223, & 223 AI. Why? Primer cups are thicker and they deliver the best, most predictable and accurate performance. I use H4895 and Benchmark powders in the above calibers.
Have ran several tests over my chronograph, some non magnum primers ignite powders just as well as magnum primers will.
In the 300 win mag, using H4831, time will tell. Fed 210's work rather well, but so do the CCI 250's and the 215M's.