Aalf
The primers I have make no mention of being magnum. Nowhere. Neither on the case box or the individual boxes. I would speculate that if they were considered “magnum” then Remington would have noted that somewhere on the package. But who knows......we are talking about Remington..
Charlie
Funny, in my googling around, I found pictures showing boxes that don't show them as magnum, but the descriptions say they are.
Then I found this post on another site from 6/2020:
Figured I would make a post about these Remington 5 1/2 small pistol primers. I bought some a while back. I was loading some 9mm early last week and used some of the 5 1/2s I bought to test out. I didn't get to load them that day so they went in with other primed cases I had ready....pretty much all CCI SP. I usually keep around 600-700 9mm cases size and primed and ready for loading at any given time. So after I loaded up 200 rounds, I came across some Remington small pistol 1 1/2 primers in a store. So I wondered what the difference was. The general consensus online was the 5 1/2 primers are magnum. Well, they don't say magnum on the box. I do use SP magnum, and have plenty in CCI and Win...but use them in 357 Mag. So now I get aggravated as I'm thinking I'll gonna have to pull all those rounds apart to find those "magnum" primers somehow. I did go through all my primed cases, very time consuming. I'm pretty sure I found over half of them from what I could see through the flash hole, comlared to the color and appearance of the anvil of new primers in the box. Did some more online research, searched Remington's site, no additional info on the differences. Just says not to use the 1 1/2 primers in higher pressure rounds like 357 Mag, 357 Sig, 40 S&W. I found where others stated the 5 1/2 primers were not magnum, but just a thicker cup. So I ended up just calling Remington today myself. They told me they are NOT magnum primers, but just a thicker cup for higher pressures. Just standard small pistol, same amount and mix of priming compound used in the 1 1/2. A lot of people believe they are magnum, just wanted to put it out there that they are NOT per Remington. Now if you want more confusion, JB says otherwise:
http://www.sksboards.com/smf/index.php?topic=56422.0
