I have seen that primer test before. Don't know what it proves, any more than photos of the flame.
An independent ballistic lab test done in the 1990's ranked both the standard WLR and WLR Magnum primers as hotter than either of the 215's and the CCI 250, according to both pressure and velocity. However, it was only performed with one cartridge, powder and bullet, and the company freely admitted results might be different with other combinations. The same company also often found a measurable difference in the "same" primers from different manufacturing lots.
“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.” John Steinbeck
