Gonna try to make this a thread about all the things we do to/for Cases.

For this thread, Full Case Prep is: Deburr the Flash Hole, Square the Primer Pocket, Trim, Champfer, Deburr and Weight Sort.

FLR = Full Length Resize
P-FLR = Partial-Full Length Resize
NS = Neck Sizing

Question:
Do you do any special Case Prep?

Choices:
1. Yes - absolutely!
2. No - total waste of time. I just load them up and let them rip.
3. Other.

Question:
Do you do a Full Case Prep?

Choices:
4. Yes, I want them as close to the same as possible.
5. No, total waste of time.
6. Other

Question:
Do you "Primarily"

Choices:
7. FLR
8. P-FLR
9. NS
10. Other

Question:
Do you concern yourself with Concentricity?

Choices:
11. Yes, it really makes a HUGE difference.
12. No, I P-FLR so it is of no concern at all.
13. Other.

Question:
Do you use a Lee Factory Crimp?

Choices:
14. Yes.
15. No.
16. Other.

Question:
Do you Fire Form all your Cases prior to Load Development?

Choices:
17. Yes.
18. No.
19. Other

 

If i'm using good brass (Norma, Lapua, RWS so far) I don't bother with case prep past sizing, trimming and chamfering.

With cheaper brass (Privi, Remmington, Winchester, IMI so far) respond to weight batching, flashhole de-burring in addition to the above.

I tend not to uniform primer pockets, if the cases need it, ie seat primer at varying heights when seated by hand to gauge feel, I tend to give the brass away or load it up for a mate who just hunts.

I neck size using the Lee tool until the cases need FL sizing, depends on how hot they're loaded, and then use a redding body die with the expander ball removed.

I ultrasonically clean the cases briefly first to get the worst of the dirt off, and especially in the primer pocket, and polish in the tumbler until lovely and shiny!

I don't differentiate in the prep routine for my hunting and target rifles, unless i'm in a hurry, 'cos I loves my rifles and shooting little groups with them.

I do everything but weight sort.

I watched a video that amann posted by a benchrest shooter. He said weight sorting even for benchrest had no affect on group size. He said that making sure all of the cases were trimmed exact was a much bigger concern and he and a fellow competitor had proved it.

Conversely, my gunsmith says he loads his ammo "like a shotgun shell". He does absolutely no prep except trimming when necessary and his guns shoot as good as mine....

I bet it makes very little difference unless you need one-hole accuracy at 200 and have a rifle that can do it...tight neck, special chamber, 30 pounds, etc....