Accurate 1680 ?

[velocette]

For a .32/20 WCF Whitney 2nd model rolling block rifle. (Circa 1888). I have several Accurate 1680 loads for 100 ~ 120 gr
cast bullets at 14 grains. I want to learn if that load can be reduced safely. How does 1680 respond at lower loading density?
I am interested primarily in accuracy, not wanting to damage my rifle or set new velocity records for a .32/20.
Any suggestions or advice?

[Yodogsandman]

You could ask Accurate Powders directly. Otherwise, with no other published data, you should stick to the loads given.