Now there have been a few replies let's clarify some points. First, notice that everyone who has a reasonable degree of experience, not just tried it once, using SRP in place of SPP indicates their experience mirrors mine.

The CCI SRP was used as they have a "reputation" for being a harder primer. Whether they are or not is arguable when comparing lot-to-lot. Any gun that has a problem lighting any primer has a problem that should be addressed. Usually someone tinkered with it to lighten the trigger pull.

A striker fired pistol was used since they supposedly have lower firing pin energies than revolvers or hammer fired pistols. The photos were posted to demonstrate that striker/firing pin energy in at least this Browning is fully adequate. I am surprised no one even mentioned this!

The old saw that changing primers can radically change pressure of a specific load is easily disproved by the use of the chronograph. Overly cautious wording of loading manuals notwithstanding that give such dire warnings are fully disproved by the fact that with identical loads the different primers give statistically equal velocities! Same load, same velocity, same pressure, just that simple. Ask any engineer in any of the ballistics labs and if pressed for a straight answer they will tell you the same thing!

Finally some anecdotal evidence. Several years ago a member of this forum made a claim that he knew a woman who worked at CCI and had access to engineering data for their primers. He said he had asked her directly if there was any difference in cup hardness, thickness, pellet weight or composition among the various primers of the same size, (presumably small). He stated that the answer he had received was that there was no difference, they were identical except for packaging! I have no recollection who it was. Perhaps if he sees this he would be so good as to confirm his statements! Why are different primers sold? Because people expect there to be specialization and would shy away from any manufacturer who simply sold "Small Primers" for any use while others made "specialized primers" for specific applications. Look at how many question Winchester for making only one Large Pistol primer for both standard and magnum cartridges! They can't believe this can work. Perhaps the greatest difference in primers is found in the expectation of handloaders, and not in the actual manufactured product!