I don't have RAUG brass, but there are two shell holders from RCBS which both work on 338LM. One is #14, one is #43 (I think I'm correct on these numbers, double check me) Anyway, perhaps one of those would work for you.
I do not know about Ruag brass but I do know that there are some shellholders thar do not fit Lapua brass. Redding shell holders fit, but RCBS did not fit my 338 Lapua brass.
I do not know about Ruag brass but I do know that there are some shellholders thar do not fit Lapua brass. Redding shell holders fit, but RCBS did not fit my 338 Lapua brass.
You must have the wrong one of the two RCBS ones then, because I have 200 rounds of Lapua Brass that fit quite nicely in my shell holder RCBS#14, not specifically listed just for 338LM like the other one. At least you do have a shell holder that fits them though.
I never tried the #43(?), the one that is meant to be for 338LM.