I've been using bulk Winchester and Remington jacketed bullets purchased from Midway
www.midwayusa.com for years with complete satisfaction. For 9mm I prefer the Remington 115gr JHP. Others may be a bit cheaper, but Midway's excellent service more than makes up for any small price difference.
nwgunman is right on about shipping. Beware companies with prices that are real cheap. Odds are the shipping cost will kill any possable savings and end up acually costing you more.
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Artificial intelligence is no match for natural stupidity.