Another thing. Make 10 rounds with the min charge in your reloading manual. Then increase 0.1 grain and do another 10. Repeat for a few increments but stay below the max charge. Make sure you label them and when you test fire use the lowest ones first. Examine the cases for any sign of over pressure. Do not use anything with a higher charge if you see bad signs.
also...load some dummies and pull the bullets. You need to learn to pull bullets as you will only have to pull 10's of them and not hundreds if you take your time. I like the Hornady collet puller with the red handle. They work great