You've learned a valuable lesson on why you should not rush and/or cut corners when handloading. Fortunately you didn't lose any body parts this time. Handloading is serious business with the potential to cause you and bystanders great harm. Next time get the right equipment, good components, and use good technique.

I see a couple probable causes to the hang fire problem. First might be that some (or all) of the old primers were bad due to age and contamination, and/or they got contaminated when seated in a dirty primer pocket as it only takes a tiny bit of oil or moisture to neutralize a primer. Secondly (and the most likely cause), even if the primers were in perfect condition, when you used the wrong priming tool (I really don't know why you even tried this), the primers were not seated with the anvils firmly against the face of the pocket, the firing pin wasn't able to crush the pellet of priming compound hard enough to get a quick and full ignition because the primer could and likely did move forward absorbing some of the force of the firing pin impact.

At least you acknowledge your mistake. Please, for your sake and those shooting next to you, no more shortcuts. If you aren't patient enough to take the time to get the correct tools and do it right, please go buy factory ammo. You'll keep your face and fingers longer.

Mike