I think the lockout die is money well spent if you are using a progressive.Also get an RCBS Lock Out die.
Finding the right charge for your gun requires you to test out varying loads, both for accuracy and how the gun behaves when discharging spent shell and loading new round. I suggest you go for one brand and stick to it. For example, I found that when loading .38s for my trusty revolver, going below 3.1 gr Vihtavuori N320 with 148 gr DEWC at seating depth 29.5 mm decreased accuracy from 3 cm spread to 20 cm or more at 25 m range. No, I don't have a 9 mm yet. Begin at starting load and go up and down, 0.2 gr increments will suffice. This will of course vary from gun to gun. Use the data available, like here, weigh and measure often and chances are you'll do well.
Start load isn't necessarily minimum. You can go below as long as your gun reloads. Yet it's, as you say, a matter of shooting discipline. But is going for accuracy a bad thing?The problem is that MANY 9mm loads only have a 0.5 gr spread between minimum and maximum, there's a large number of them that are 0.4 gr spread or less.
It really depends on which shooting discipline you're in. If you're in some action type shooting then you don't need bullseye type accuracy.
All the advice Texas gave you was great, but this last part was the best. In a Dillon press, Dillon dies work the best and give you the most flexibility.Also, if you haven't bought dies yet I highly recommend Dillon pistol dies. I used to think they weren't worth the price. I was wrong. They are worth every penny.
Lots’o good info, esp from 10mm.
Be sure to get your bench and press ergonomics dialed. Sit/stand, knee/foot clearance, press/bench surface to floor...all critical. Along with very bright light and check weights.
Carefully consider various brass cleaning methods before proceeding - in keeping with 650, streamline. 3-5k rnds/mo is a job...may want to get your fam involved and spread the joy.
Welcome to the slippery slope...enjoy!
Lots’o good info, esp from 10mm.
Be sure to get your bench and press ergonomics dialed. Sit/stand, knee/foot clearance, press/bench surface to floor...all critical. Along with very bright light and check weights.
Carefully consider various brass cleaning methods before proceeding - in keeping with 650, streamline. 3-5k rnds/mo is a job...may want to get your fam involved and spread the joy.
Welcome to the slippery slope...enjoy!