You should distinguish between initial case prep and case prep after shooting.
There is no need to chamfer after initial case prep - only after you trim subsequently.
Here's my procedure for fired cases after shooting:
1. Tumble to clean cases.
2. Lube w/ Imperial Sizing Wax - Full size with a .001 to .002" shoulder bump - spot check shoulder bump with gauge.
3. Wipe cases clean after sizing w/ paper towel.
4. Clean Primer Pockets - check pockets for any residual media stuck in primer hole
5. Check Length - trim if necessary - chamfer after trimming.
On new cases:
1. Check Length - trim if necessary - chamfer after trimming.
2. Chamfer before sizing if not done for trimming - reason - edges on new brass can scare die.
3. Lube - full size with zero cam - to uniform cases but not set the shoulder back*.
4. Wipe cases clean.
5. Debur Flash Hole and Uniform primer pockets.
Assumes cases are dedicated to a specific rifle and not interchanged with other rifles.
* on a new lot of cases I'll spot check in chamber of rifle to verify fit after sizing.
There is no need to chamfer after initial case prep - only after you trim subsequently.
Here's my procedure for fired cases after shooting:
1. Tumble to clean cases.
2. Lube w/ Imperial Sizing Wax - Full size with a .001 to .002" shoulder bump - spot check shoulder bump with gauge.
3. Wipe cases clean after sizing w/ paper towel.
4. Clean Primer Pockets - check pockets for any residual media stuck in primer hole
5. Check Length - trim if necessary - chamfer after trimming.
On new cases:
1. Check Length - trim if necessary - chamfer after trimming.
2. Chamfer before sizing if not done for trimming - reason - edges on new brass can scare die.
3. Lube - full size with zero cam - to uniform cases but not set the shoulder back*.
4. Wipe cases clean.
5. Debur Flash Hole and Uniform primer pockets.
Assumes cases are dedicated to a specific rifle and not interchanged with other rifles.
* on a new lot of cases I'll spot check in chamber of rifle to verify fit after sizing.