Shaving bullet when seating

[chuck s]

I have a 1050 and lately I have been having issues with shaving the plating off of my bullets when seating. I am using 147 xtremes, all Dillion 9mm dies. I assumed it was that I did not have enough bell, so I fixed that ,but the problem if anything got worse. It is as if it is not really shaving the plating but instead pushing it up when seating. Any thoughts?

[JaeOne3345]

Who and how was your brass prepped? I have seen this happen with bulk once fired brass sources that tumble in a big cement tumbler. The case mouths get kinda banged up and there are lots of burrs, which then catch the bullet/coating when seating.

[chuck s]

I use range brass and tumble it myself. I have been doing it the same way for 3 years and only recently has it become an issue. I have tried 2 different dillon seating dies with no difference.

[Brassaholic13]

Photos of the bell mouthed brass would help.

[ttownracer]

Any shaving if you cycle thru station while the die body in place but seating insert removed?

Sent from my iPhone using Tapatalk

[dillon]

You may need to run the swage backup die down a bit further. A 147 gr bullet , unless boat-tailed, seats very deep in the case. I suspect running this die down further, which expands the inside of the case, might reduce this occurance.

[chuck s]

I will give it a try . Thanks

[lcs]

I have a 1050 and lately I have been having issues with shaving the plating off of my bullets when seating. I am using 147 xtremes, all Dillion 9mm dies. I assumed it was that I did not have enough bell, so I fixed that ,but the problem if anything got worse. It is as if it is not really shaving the plating but instead pushing it up when seating. Any thoughts?

I use X-tremes and find the plating to be pretty hard. What do you mean by "pushing it up when seating"? Can you give a clearer definition or pic.

I saw Dillon's reply and I don't think because a 147 seats deeper it it causing the problem. How are you determining the problem? pulling a bullet after you seat it? Are you breaking the plate to bullet? If this is happening then your crimp is way to tight.

[chuck s]

I will try to post a pic. It happens at the seating stage and the shaving is pretty dramatic some of the time. I am not sure how it happens with such a large bell. You can see the copper piled up around the case mouth and the bullet would never seat in my gun even with a very small amount of shaving. The last stage is a FCD and has always worked very well.

[chuck s]

I finally got things working properly. Interestingly, I was belling the cases too much. Over time, the bell was getting larger and I did not notice it, then the shaving kept getting worse. I assumed I needed more bell and it got worse again. I finally figured out that as the bell got bigger, it was getting compressed as the case went into the seating die and shaved the bullet. I decreased the bell markedly and all is well now.