loading Rem. 102 gr. G>S> for.380 +P

[dgang]

I'm trying to load up some 102 gr. Remington Golden Saber bullets for my Sig. 232 ( which I understand is a pretty strong pistol for being a blowback action) but have been unable to get any info from Remington, they sell the bullets but are unwilling to give any info about the pressures their loaded ammo developes. The major  powder manufactures don't have any data either, that I can understand. I am concerned that the jacket is brass rather than copper, but also realize that only a portion of the jacket come into contact with the grooves, the rest of the jacket rides the lands, how does this effect pressure? I'm now loading the 102 gr. G.S. on top of 4.2 gr. of Unique, producing around 1000 fps. Does anybody reading this have any information on load data for this bullet that would not exceed 20,000 psi?
( a.380+P load)
Thanks for your time and good shootin' to you
dgang