Of course it is.
(But then we know that QL occasionally does strange things w/ straight walls -- which
requires case volume adjustment beyond p[hysical dimension to correct the internal
ballistics, and the SIG is definitely a strange case in that regard) <g>
I'd try the low load -- 13.1gr -- and see what the velocity looks like,... then decide on
the next step. (My usual methodology to be sure.)