Primers are funky little devils. It does seem that most shooters are most interested in their binary function, IOW will they go bang or will they fail to fire.
However, the brisance and compatibility with the powder type and amount are important considerations or factors as well. It's well publicized in shotshell loading manuals, yet I see very little hard data for pistol primers. The same pressure and velocity variations are present, but the variation is a bit less critical because handguns are a bit more tolerant to those variations.
For IPSC, the loads are near max, so for a primer swap a quick velocity check to ensure power factor is being maintained is probably all that is required. That's my guess, my discipline is Cowboy, and for the small charges of powder and low velocities, the differences between primers is or can be rather dramatic.
I use a chronograph for load development as a rule. Because the load density is low, powder position is a real factor, and just as some powders are or tend to be position sensitive, some primers do a better job of mitigating that powder position sensitivity.
You did not tell us what your load is now. The kind of powder and amount are important, as is the caliber you are shooting. What primer are you presently using? What bullet (type and weight) are you shooting? And what velocity is your load?
Case in point: I had a 45 S&W load that gave very decent numbers and shot decently enough. I started to notice a bit of unburnt powder in the case and I was missing the odd target even though the hold and aim seemed good. Therefore I sent a few rounds over the chronograph. The good load I had was no longer good. I'd lost about 100 fps and the Es and Sd numbers were bad.
I really wanted to know why and after a bit of testing I believe I found the answer. I had made a small change in the primer. I was using a current lot of primers and had run out. A local dealer had some available so I bought them. They were not current production, about 10 years old, and they were not doing the job. Fortunately when I had developed the load another primer had given me good numbers as well. In an attempt to get better numbers I had increased the powder charge as well. Because of the primer swap I was able to lower the charge as well. I ended up a bit higher in charge, with the original powder, as a bit more velocity helped the load shoot to the sights. That's the 10,000 ft view, the details are bit convoluted, but bottom line, primers have an analog side to them, it is not as simple as bang or no bang.
Federal primers have a thinner cup than other pistol primers, they can tolerate a light hammer spring, but they are not the lowest in brisance. I think lock time is more important than super light hammer pull, so the softer cup is not as critical to my load development. But that being said, I do on occasion use a Federal primer because it gives me consistent velocities and good accuracy.
My load utilized a long ago discontinued powder, WW 452AA, and the original primer was a CCI 300 LP. My original charge was 3.7 grains and I increased that to 4.0 grains and changed to a WW LP primer. My velocity with a 230 grain (LEE 452-228-RN) bullet is around 650 fps and the Es and Sd are acceptable, (not single digit Sd but very close). My revolver is an open top 1871/72 Uberti, in 45 S&W, so not an IPSC gun.