Ok so I half-way got into casting at the start of the year, but then work got pretty busy for a couple of months so I'm just now getting back in the swing of things. Here's the problem. I think my bullets must be casting a bit wider than expected. Most of them seat just fine like the one on the left (with a little extra flare of course) but every once in a while I get one like the one on the right: As you can see, the case has actually been visibly marked by the seating die. I'm thinking this can't have anything to do with how much flare there is, but instead it has to be that the bullet's diameter is simply too large. The seating takes more force, enough that it's definitely noticeable. I compared the mouth diameter of the two in this picture and the one on the right is a couple of thousandths larger. I tested a couple to see if they would feed, and they do so just fine. I've noticed that unlike the ones that seat OK, these produce shavings during seating, so I'm sure they'll lead the barrel. FYI, these are the tumble lube 124gr RN from a Lee 6 cavity mold. I've measured quite a few individual bullets at the lube grooves, pre-lubing, and it appears very few are coming out at 356. Most are 357 to 359. I'm using straight wheel weights, water dropped. Also, I realize I got a little too much liquid alox on these. :embarassed: How much is enough? Thanks! I have a ton to learn and I know it.