Having an extra $30 to spend, I bought 8 bump keys for various padlocks and deadbolts that I own. They're the kind of bump keys that you use the "pull back" method with.
After about three hours on various locks (Masterlock 930, American 5200, various Brinks locks, Schlage deadbolts, etc.), I have not been able to bump a single one, even using various tensions, various things to tap the key with, different timings, etc.). I'm guessing it's a problem due to the security pins in the locks but then I see posts on here from a few reputable members claiming to have bumped similar locks to mine open in minutes, if not seconds, with security pins in them. Any tips you guys can offer? I promised to dedicate another half hour or so to trying before I asked for help on it and I've exhausted that half hour.