Resizing, before or after annealing

P7M13

P7M13

Well-Known Member
LRH Team Member
Joined
Jan 5, 2016
Messages
1,174
Location
Orygun
Fire, Anneal, Deprime, Tumble, Sizing, wipe, Prime, Powder, seat bullet | Repeat as many times as possible.

100% sizing works the brass more than firing.
That gets a, "it depends..." from me.

Bolt guns with SAAMI chambers, yes, sizing works the brass more.
Fire forming brass? Chambers that are too long for the cartridge, firing in an AR that has a generous chamber? Firing works the brass more. With ARs, especially AR10s, it's also a special case that I insist on full sizing with a shell holder that's milled 5 thousandths and a small base die in order to not have any stuck cartridges. I have found, it's always the base that gets me being interference fit or a skosh worse.
 
WildRose

WildRose

Well-Known Member
Joined
Feb 3, 2011
Messages
14,831
Location
N. Texas and S. Africa
Its early, so please go slow and draw pictures for me. In your opinions, which is the proper sequence?
Fire, anneal, size, polish
Fire, size, anneal, polish
Fire, size, polish, anneal
I use a universal decapper now so the first thing I do is recap, then clean. If I'm going to anneal then is the time before I start working it.
 
WildRose

WildRose

Well-Known Member
Joined
Feb 3, 2011
Messages
14,831
Location
N. Texas and S. Africa
so since you use the word could instead of will, means that it hasn't happened to you. And as far as leading to trimming and neck turning it doesn't. The only time I had to trim is when I used to completely FL size. Once I began to partially FL or better called shoulder bump I don't have to trim or turn necks. Turn necks once and that's it. The only time I have to trim is loading for my M1 GARAND
Brass flows every time it is worked. The softer it is, the more it flows.

If you're reloading a case numerous times and don't have a generous chamber sooner or later that lengthened neck will bind and can create some serious pressure problems.

I learned early on that trimming my cases to length is an essential element in making reloading safer.

If you have yet to run into that problem, you're lucky.
 
ButterBean

ButterBean

Well-Known Member
LRH Team Member
Joined
Feb 5, 2012
Messages
6,187
Location
West Terre Haute Indiana
Brass flows every time it is worked. The softer it is, the more it flows.

If you're reloading a case numerous times and don't have a generous chamber sooner or later that lengthened neck will bind and can create some serious pressure problems.

I learned early on that trimming my cases to length is an essential element in making reloading safer.

If you have yet to run into that problem, you're lucky.
Not to derail but I trim every loading as well even though it’s not needed
 
M

MagnumManiac

Well-Known Member
Joined
Feb 25, 2008
Messages
4,376
The sizing process after firing moves the brass the most. This is why I anneal before forming and after firing before sizing because this is where the brass is moved in every direction.
The amount of movement to work harden a piece of brass is quite a lot after it has been annealed. If you fire a case numerous times with minimal sizing, it could take 10 strokes of firing and sizing to work harden the brass enough that it becomes difficult to re-size. But we often never do this. I have a match chambered 6.5x47 Lapua that I shot one piece of Lapua small primer brass in 20 times, the brass never moves more then .003” in any direction. That case has NOT been annealed and may never need it.
It is solely governed by how sloppy the chamber is, the die dimensions and the stability of the brass.
To minimise brass movement, you need a plan. Mine is absolute minimum die specs, honed necks and altered expanders and a final size with a mandrel. Absolutely no chamber neck clearance larger than .003” if it can be helped.
Body dies are invaluable if you can get them at minimum spec.

Cheers.
 

Similar threads

MTbackwoods
Replies
65
Views
15K
MNbogboy
M
A
Replies
1
Views
2K
varmintH8R
V
M
Replies
11
Views
17K
K
B
Replies
16
Views
5K
loaders_loft
L

Recent Posts

Top