I've loaded about 8000 124 gr. fmj in 9mm, and shot about 4000, all with no snags. Used Berry's Bullets for years, with no complications. I load a 124 gr. fmj over 5.6 gr. of Unique, chronographed at 1125 fps M.V. I have tried to match the Federal HST hollow points I carry concealed. The Berry's are much cheaper to train/practice with. I stick to standard velocity as I carry a compact Ruger SR9. It's a small frame, but I love it. I trade a little knock down power for shot placement. I'm comfortable with that. The reloads cost me about $ .13 apiece. The other posters and I agree on the enjoyment of reloading.
Although, I was too tight to buy Dillon. I went with Hornady AP progressive and haven't looked back. Still have my old Pacific single stage to do trial recipes. A good reference or even 2 is a must. Read, study, load, read, study, and load some more. I've been loading for about 28 years. Shotgun, pistol, and rifle. Weigh the charges when working up loads. Use the books as a guide, but throw in a hefty dose of common sense too. Good luck, and keep your powder dry!
I tried 4.5 gr. of Bullseye and it was OK. But my pistol likes the Unique much better. 4" 10 shot groups at 10 yards is common for me now.