This is the process I have come up with for prepping brass I bring home from the range. I have tried to find ways to cut steps to save time but this is the best I can come up with.
- run through sizing die (obviously lube first if needed)
- check length
- trim (if needed)
- toss if too short
- clean primer pocket
The cases are now ready to load. Here are some of the consequences of skipping some steps:
Skipping step 2 will gum up your dies causing cases to get stuck and/or not size the case to speck
Skipping step 3 will cause the case to not be measured correctly
Skipping step 4 will at best cause your accuracy to be inconsistent, at worst you get rounds out of spec that can cause serious injury
Skipping step 5 can cause you to not be able to seat the primer all the way into the pocket
Step 6 is probably the only optional step in this list. The reason I say this is because the consequence of not doing this step is mitigated based on the type of bullet and crimp die used.