That's a good choice Amadeus. I've used RCBS with this caliber for some 50 years or more........... never a problem. Most of the guys in the armory now are all Redding because my son is a stickler for very long distance accuracy. He so finicky about reloading, sometimes it makes me want to give them a good smack for being consistently so good at it. Darned kids.

Ja, es ist schon eine ganze Weile her. Schön, deinen Namen wiederzusehen. Ich fragte mich, wohin du gegangen warst.

---------- Post added at 03:02 PM ---------- Previous post was at 02:57 PM ----------

As long as were talking about dies, ......... this is one of my archives I wrote a while back:

Gentlemen, if you consider that the original GP11 cartridge being sized as it is, cycles smoothly in every single Swissicon rifle that is chambered for that cartridge and that begins with the 1800s right up to the PE 57's and the MG 51s and everything in between.
The 7.5 x 55 requires a full-length sizing every single time, and that means you're going to be using a cam over function to complete the full-length sizing.All of this business about different dies for the different rifles is a lot of bunk. The GP 11 cartridge was universal to the 1896, the 9611, the G 11, the Kadett, the K31, the ZFK55 and the PE 57. If the GP 11 cartridge as sized in its issue form works in every one of those rifles, why would anyone require a special die for a specific rifle?
In all my years of load data collecting for reloads, the RCBS worked perfectly and gave me the desired results every single time. I will admit that we do have a preference for the Redding dies, but the RCBS works great for target shooting and hunting. We use the Redding dies for long-distance and precision shooting. This is not as complex as a lot seem to think it is.

If you're unsure about the validity of this, long ago I wrote a reloading specific series on the old Swiss rifles.com with directions on how to reload the GP 11 cartridge in a manner that will function and form every single time without fail.
As for the .284 case, it will function perfectly every single time in the G11 rifle once is been trimmed and fire formed. It's a very dependable case, however with the K 31 you may find one in 10 times the case will not extract and that's because the rim on the 284 is very slightly smaller and definitely thinner than that of the GP 11 cartridge.
If you go to this link Swiss Products | swissproductsusa | Kalispell Montana
and open the FAQ at the top right of the page and then scroll down to "what is the process for reloading the 7.5 x 55 cartridge" you will find a specific that will work with your reloading system and every single one of your Swiss rifles.