G'Da Fella's,
Flashman, in reality, we were all using factory cases, for decades, before we even heard about de-buring primer flash holes.
This came about from the Bench Rest crowd trying to get any assistance they could, to get their already tiny grouping rifles, to shoot even smaller groups.
So................ unless you have a really accurate shooting rifle (like Sub 1/2", and your as good a shot as the rifle), I imagine you won't notice any difference.
On the other hand, if you think this will make you a World Beater at whatever you shoot/hunt, go to it and more power to you.
By the way,
http://brtshooterssupply.com.au are great people to deal with and have forgotten more about Accuracy Shooting, than most of us know!
Hope that helps
D'oh!
Homer