[quote=Mule Deer] You don't prefer Reloder 23 in the .270 as more stable than Reloder 26, but giving higher velocities than H4831sc (though not as high velocities as Reloder 26)?
The best way to compare velocities with certain powders is using the same method of pressure-testing in the same barrel. Hodgdon's listed H4831 data is one that they haven't updated by using piezo-electronic (PSI) method. Instead it's from copper-crusher data, listed as CUP. And their maximum load is only listed at 51,200 CUP, while 54,000 CUP is equivalent to the SAAMI maximum average piezo pressure pf 65,000 PSI.
Speer's latest Number 15 manual uses piezo testing, and in the same barrel the maximum charge of H4831SC they list for 150-grain bullets 57.5 grains is 2860 fps from their 24" test barrel. Their maximum load for RL-23 is 54.7 grains for 2874 fps, for an "extra" 14 fps over H4831. I doubt that would make any difference in the field.
Plus, I have found H4831SC far more available than RL-23 over the years--and even now. Our main local sporting goods store even had H4831SC in stock the other day.
