I wish I could give credit to the original author but I can't remember were I even got this, it's been a few years back. I found it interesting but I have no idea how accurate this test is. There is a lot of variables it doesn't address.
I also ran a limited test to try to rank primers by brisance or "hotness" kind of like a burn rate chart. I established two very consistent loads, one each in .223 and .308 then shot ten-shot strings with different primers. I judged "hotness" by velocity results only.
It was difficult enough finding them all that I only did rifle primers. From "Hot" at the top to "cool" at the bottom, here's what I found.
Large Rifle Primers
Fed 215
WLRM
CCI 250
Rem 9 ½ M
WLR
F210
CCI BR2
CCI 200
Rem 9 ½
Small Rifle Primers
Fed 205
Rem 7 ½
WSRM
Fed 200
WSR
CCI BR4
CCI 400
Rem 6 1/2
Note: some results were very close together, such as the Fed 215 and WLRM. In another cartridge or another load, they might reverse.
