I used retumbo in the 6.5-284 for years with the longer barrels it worked very well. I switched to 26 based on a gut feeling and it paid dividends in that it works across several cartridges for me. On my youtube channel I have a few vids messing around shooting at clay pigeons, rocks, etc for training fun. I am huge fan of 1st round impacts and not too focused on groups. I literally hate shooting paper and groups most of the time. Since getting my 6.5 PRC I have shot a fair amount of groups but really just like those pick a spot and shoot at it days. This year it has paid off. Whacked quite a few yotes 500-1125. Couple at 660 and 692 and 1 at 1125.