I have a seating die doing the same thing with the mushroomed stem. I sent it back to them. They said they fixed it. 20 rounds into seating and it mushroomed again. Its smack dab in the middle of competition season. Called them on Monday and left a message. They called me back and Tuesday and said they would have to talk to the technician and give me a call back. Still nothing!! I had to buy a Hornady seating die locally that I had to modify the seating stem on but it worked way better than the Forster that wouldn't seat accurately because of the stem. Ordered a Redding competition seating die with a long VLD stem. Its not here yet but hopefully it will work for me. When it gets here I will have 3 seating dies for the 6.5CM, Forster is now a paper weight, Hornady is modified but works, and hopefully Redding will be a winner.This has been my experience as well.
The original press crushed the spent primer tube. Since redesigned. They will not send replacement parts for the original screwed up design unless I ship them the part at my expense.
Last two seating dies had out of spec seating stems. One failed on the first pull of the handle. The seating cup mushroomed on the second. Same story: send us the part at your expense and we will think about replacing it. This means my co-ax press is unusable for weeks at a time.
Complete dicks describes their customer service accurately.
Unusual in an industry known for outstanding customer service. DILLON they are not.
I have had zero problems with dies from three other suppliers for a dozen or more calibers.