For such a little thing, it really made a difference. I have a Dillon RL450 that I have been upgrading. I have kind of made it into a 550 but I still have not replaced the frame as I like the solid mounts for the dies on the RL450. One of the few things that bothered me about the Dillon presses...the spilling of powder on smaller cases as you spin the turret base to the next stop. It gets kind of stiff and stops abruptly causing powder to spill out making a mess if you are not careful. The design of this ball and spring makes that a thing of the past. The turret now spins smoother with very smooth stops. I combined this product with the bearing kit for the Dillon presses and it really smoothed out the process. For such a little thing, it made a difference you can see and feel. I highly recommend the Detent Ball and Spring kit for the 450-550 and 650 machines. For the price, you just have to try it!Read full review
Verified purchase: Yes | Condition: New
Placed this in a Dillon 550 after seeing powder spill from cases as you advance the shellplate. The ball that indexes the shell plate, snapped into place a bit harder than needed, and created a vibration that would project a small amount of powder from the shell... Mostly 9mm. The the low-weight ball and weaker spring allow the shellplate to index properly, and with less force. Noticed a difference in the 650 as well.
Verified purchase: Yes | Condition: New
Had one for my Dillon 550 and now am getting one for my 750. As far as I can tell, it has helped smooth out the indexing or the press.
Verified purchase: Yes | Condition: New
This tiny little device improved my operation greatly. Now it operates so smooth and never spill gunpowder. I would highly recommend this to anyone who has a Dillion Reloading Machine.
Verified purchase: Yes | Condition: New
I'm a very new reloader. Only been doing this for 6 months. I acquired a Dillon 550 from a family member who just happened to have it sitting in the garage, not being used. Can't ever beat FREE! Anyway, I disassembled and cleaned it up. The rotation of the shell plate was a bit 'jerky' on occasion with a bit of powder loss. This upgrade is very nice. It's very smooth. Thanks.
Verified purchase: Yes | Condition: New