I just keep cutting and pasting this..........
RL26 seems to be directed towards overbore, higher pressure cartridges and heavy for caliber bullets. Alliant probably published cartridges and loads that they thought would benefit the most from RL26. In some of the published loads, the increase in velocity is small, in other cartridges a fair amount of increase. I see RL26 as almost a "speciality" powder for a relatively small number of cartridges.
I would think Alliant will be offering more load data in the future.
Of course, that doesn't stop loonies from pouring RL26 into everything that shoots.............
Alpine,
When RL 17 first came out it said on the container........"Designed for Short Magnum Case Capacity"
Now reloading manuals everywhere have load data for 130s in the 6.5 creedmoor and a lot of other smaller case cartridges and in fact proved to be one of the top powders for the 6.5 Creedmoor. There's a reason slow powders don't work in small cases and its mostly because you can't fit enough in to begin to reach pressure or velocity. RL 26 doesn't have this problem
I've used a large variety of different powders and loads in my 6.5X55 Swede and so far RL 26 has proved to be one of the top performers as far as accuracy, SD, ES, and temp resistant with 140 grain bullets. The Swede and Creed are similar case capacity and if I had a Creedmoor it would be at the top of my list to try with the heavier bullets
Trystan