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Case flare loss.

Something weird is happening, and at first I thought I was going crazy. After 20-30 rounds I am finding I have to readjust case bell. Initially I will set it perfect and I can set and seat bullets just fine. Then it all goes to hell and I have to readjust belling. Any ideas what could be causing a loss in case flare after 20-30 rounds? I am tightening the die with a 1" wrench.Thanks.

Take a marker and make a vertical line on the powder die and nut. This will tell you if the die is moving or not. If the powder die is moving, after only 20-30 rounds, then replace the nut. UniqueTek makes a wrench that tightens on all corners of the nut. It prevents deforming the nut and provides for uniform torque, preventing slippage. A deep socket can be used, too (if you have one deep enough). The 1 inch nut can be damaged with a wrench that only tightens on two surfaces.

Other potential issues are:
1. Foreign material is inside the powder die causing the powder funnel to hang up in the powder die. Check to make sure both are clean and free of any grease, other material.
2. collar clamp screws are not engaged/tighten fully allowing the powder measure to move over the powder die.
3. Check that collar sleeve is still in place in the powder funnel. Page 54 , part 13845 in the user manual.

Inspect the connector body collar closely. On the versions made since about 2000, there is a bolt that goes through a bushing to secure the roller. I suspect either this screw has backed out, or the support arm has become damaged.

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