You still aren't getting my point.
Your post read as if when you went from 26" to 29" barrels was when RL25 took over because the slower powder did better in the longer barrel. As if you could lengthen the barrel on the 300 or 338 and then 25 would take over from 22.
My contention is it was more likely that you reached the tipping point of needing a slower powder when you went from 300/338 to 7mm on the same class case. In the 7mm on that case 25 would be faster in a 29" or 26" or 23" for that matter.
