When you say "blowback", do you mean that you can feel stuff hitting your arms and face? If so, I get the same thing with my PT1911 with lower pressure loads. With "full throttle" 230's I don't see the issue. For my USPSA loads I like 200 grainers. Unique is the worst(down right annoying), HP-38 is a little better, but Titegroup has the least amount of blowback. I assumed that the Taurus has a sloppy chamber and needs the extra pressure the seal it up. I doubt that a Springfield has a sloppy chamber. I am new to this so take this with a grain of salt.