alamogunr,
I do load Somchem's MS200 and S121 which is very similar to your Bullseye and RedDot powders...according to my burn rate chart, so just check that before you proceed.
So what I am loading with this boolit, that is the LG version and powder coated, that I have been using for a few years now, is 3.7gr MS200 with the COAL at 1.112. This gives my 980 f/sec which is not a hot load at all but a very nice plinking load and it also makes the IPSC power factor easily. This is fired from my CZ Shadow 1 of which the barrel length is about 4 inches if I am not mistaken.
Unfortunately due to the COVID19 lock down here I have not been able to do load development on the NLG version, but I suppose the velocity should not be drastically different from what I have been reading here on the forum?
So, that is my load and is not what I say you should load with your powders, but maybe it can be of some use for you when you try to work out what you should load with your powders.
Hope I could be of some assistance to you, and keep us posted on your progress.