Highvoltage, when I worked up a load for my 6.5-284 Norma with Rel 26 and the 130 gr Sierra GC I initially seated the bullets to 20 thou off the lands. My best load was shooting 3 shot groups at around 0.48 MOA @ 100. Then I tried them seated at 30 thou off and my groups shrank down to .221 MOA. It maybe worth your while trying them seated a bit deeper.I loaded all loads 20 thou off and shot them. I'll have to play with it some more through the summer. I had some 130 game Kings loaded for a ruger 77 with 4064. I used them to break it in and it shot 12 shots into 1 ragged hole so I know it has potential just have to fool with it till I get it dialed in. It's my first custom and pretty excited about the whole process.
The slow powder will tighten up ES with a mag primer in this case. My crred load with 26 was 2830-55 depending on which case firing number it was with the 147 with peterson brass. I have a 5shot 5/8" group on my phone I shot at 300yds with another savage 10T The cold bore was the only only out of the .2 hole. Bought a powerball ticket that dayThat's a good load, almost makes the wsm obsolete. I've been using Winchester brass and 210 match primers. The brass is new. I've shot 26 in my creed and love it. The 143 eldx goes 2985 from a 24" barrel and half minute accuracy (factory savage Fcp-sr) I'm hoping it will work in the 270 because it's fast.