Besides the crimp, there are tolerances and things can be slightly different sizes, and that includes the primers you are using. I've had cases where CCI primers were "stiff" to seat, and Win primers seated slick as butter.
Also, while very rare today, the US did make steel cased .45acp ammo in 43. Those cases do have a slightly smaller primer pocket size than standard.
If you do have, or run across any of them, don't bother trying to reload them.
EC 43 is the one headstamp I know of. There might be others. After the run in 43, all US GI .45 ammo went back to the normal brass cases.
I've used the RCBS press mounted primer pocket swage kit. Don't like it, real PITA for me. What I do these days is simply use the case mouth chamfering tool (the one used after case trimming). The nose fits into the primer pocket and a couple of twists cuts away the crimp.
I've never had an issue with primers blowing from the "generous" crimp removal, rifle or pistol. I can see where it is possible, but I've never had it happen, and so, I don't worry about it. You should do as you think best.