Mikael, saw your post on the R2. When I got my gun I was surprised but there is brass out there. I scored a fair amount of the G&H factory brass at quite a reasonable price over at Saubier.com, the small caliber forum. A light anneal on the shoulder dramatically reduces the splits, as does a lighter bullet for some reason. I shoot AA1680 with 37gr Calhoons with quite good accuracy out of a HW.