Slightly off topic but wondering if you've tried RL-26 in the 270 weatherby John?
I think it would certainly be worth a try as it works well in the 270 WSM and the 7RM. I would split the difference between the two for an approximate load. WSM holds 75 grains of water and the 270 WM around 83 about a 10% difference. I would not exceed 7RM charges even though the .270WM is loaded to higher pressure. With the free bore you won't see any pressure indications until you are way up there with R26.
"When you disarm the people, you commence to offend them and show that you distrust them either through cowardice or lack of confidence, and both of these opinions generate hatred." Niccolo Machiavelli
