The Dillon works well, but they are somewhat pricey.
I have used the RCBS press mounted one and it worked OK, was not really fast.
I have use a manual one (wooden handle and metal extension that was essentially fluted; it worked OK, but if you did more than a few, your hand really got cramped and tired.
I have read that some people use a V-shaped countersinking drill bit, used for wood and they create a V shape that allows the primers to be pushed in. I have not done this but it is supposed to work......I don't know if you run the risk of premature loose primer pockets??
Done properly, you only need to do it once on any particular case.
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