Of the powders you have on hand.. I haven't used Tight Group. That said in MY order of preference: HP38 / W231, Unique, Bullseye. That said::
Caution: there is little published data for Plated and the following is above recommendations from Xtreme. Use at your own risk. TFL no I take ANY responsibiliy for your actions in using this info.
My Go to load with Xtreme 124 Gr. seated to C.O.L. 1.10" using either Win, or CCI SP. Mixed Win, Fiocchi, Fed. brass is 4.5 gr. Win 231. This is .1 gr. over Hodgdon's data for Berry's 124 gr.
This is also my weight for 124 gr. jacketed as well.
As usual.. work up to it. This has been safe in my P89 and Sig 239
Unique will prevent double charges but you will need to push it a little to clean up and not be so dirty.
Bullseye be careful of a double charge. It can cause short stroking in some handguns with starting charges.