Herco powder will do very nice with the longer OAL that will work in your mag's and chambers, as will ALL of the slower burning
and Alliant flake type, slow powders.

Lots of manuals use w231 with the short OAL , since it fits better than Alliant Green Dot that has the same energy but 28% more volume, that needs a longer OAL, to work.

Try a 1.12 & a 1.165" OAL in you pistol just above a starting load and see if the POA and accuracy is different.
I have found that a long OAL load that works the slide, generally has good groups.

Have fun.