AN ADDENDUM:
Not related to any other primers but.....
WW std rifle primer, AND WW mag rifle primers.
PLEASE NOTE -
When WW FIRST introduced the Mag R P I bought a brick. I already had WW std R Ps.
I used the 7 MM RM and IMR 4350 for the test comparison.
Over an O 33 graph w/10' spacing (5' from first screen and 5' to MIDDLE of screens)
***There was NO discernable difference in VELOCITY.*** Can't speak to pressure I didn't have any way to compare pressures.
I RE-emphasize that's when WW FIRST introduced the WMRP.
I haven't retested PLUS WW has made other changes since then.
Might be interesting for you to do your test PLUS today's primers I suspect will be different.
Jerry
You are correct sir, and it wasn't his test. Those photos have been floating the inner web for a few years.
As usual he posts what isn't his work, or his actual experience. Poser at best. Larry Root most likely.