I don't think so.

In trying out these new powders from Alliant some have said that.....

Quote
"RL-22 = RL-23, but temp stable + anti-copper fouling additive

RL-25 = RL-26, but temp stable + anti-copper fouling additive"



Looking at Alliants Reloader Guide site this is what I notice
for the 25-06 Rem shooting Speer 120 gr BTSP

Reloder 22 52.0 grains 2,931
Reloder 23 48.2 grains 2,988

Reloder 25 58.0 grains 3,071
Reloder 26 49.7 grains 3,020


7mm Rem Mag 160 grain bullets.

Reloder 22 63.0 grains 2,936
Reloder 23 65.1 grains 3,001

Reloder 25 70.0 grains 3,090
Reloder 26 67.0 grains 3,014

7mm STW 160 grain bullets

Reloder 22 73.0 grains 3,074
Reloder 23 74.5 grains 3,112

Reloder 25 75.0 grains 3,076
Reloder 26 76.8 grains 3,128

300 Win Mag Speer 180 gr SP

Reloder 22 77.0 grain 3,055
Reloder 23 77.2 grain 3,066

Reloder 25 79.5 grains 3,050
Reloder 26 80.2 grains 3,089




Albeit, not the same brand 28 caliber bullets, but still, something to notice.

Also, the 7mm STW burns more RL 26 over RL 25 rather than less RL 26 than RL 25 as the 7mm Rem Mag does.

The 300 Win is close.

Case dimensions being a factor here, I would say.