Fire formed brass

NorCalBowHuntr916

Senior Member
Joined
Jun 14, 2019
Messages
156
Can I take some once fired brass that has not been fire formed in my rifle and bump the shoulder back to the same dimension as my chamber formed brass ?
Just wondering if there will be any difference between the brass during load development or if they are essentially the same after sizing and bumping to the same dimension.
they are all the same headstamp. Some fired in my rifle and 20 fired through a buddies.
 

SDHNTR

Senior Member
Joined
Aug 30, 2012
Messages
1,943
FL size it first, load and shoot it in your gun, then proceed. That’s what I do.
 

204guy

Senior Member
Joined
Mar 4, 2013
Messages
1,011
Location
WY
Short answer, maybe. If his chamber is the same or smaller than yours you're gtg.

If your chamber is smaller that your buddies and his cases expanded at the base you won't be able to resize that far down the case and they'll either chamber very tightly or not at all. Bumping shoulders back is not big deal. Case body expansion is a big problem.
 

bbassi

Member
Joined
Sep 3, 2019
Messages
77
I would FL size everything so you have a known base starting point. FWIW - I've evolved to FL sizing all my hunting loads even during load development. I'll anneal every 3 or 4 shots, but my thinking is I don't want to take the chance that when I need that quick follow up I might have to fight with the bolt. With my target rifles I still fire form and neck size chasing that bug hole group, but for hunting loads I don't find it necessary. YMMV
 

Trippy

Senior Member
Joined
Jul 27, 2016
Messages
121
Location
SW Wisconsin
I would FL size everything so you have a known base starting point. FWIW - I've evolved to FL sizing all my hunting loads even during load development. I'll anneal every 3 or 4 shots, but my thinking is I don't want to take the chance that when I need that quick follow up I might have to fight with the bolt. With my target rifles I still fire form and neck size chasing that bug hole group, but for hunting loads I don't find it necessary. YMMV
I didn't think target shooters were only neck sizing.
 
Last edited:

SDHNTR

Senior Member
Joined
Aug 30, 2012
Messages
1,943
Buy a Wilson case gauge if you are worried about it. If your buddies rifle has a sloppy chamber, yes, you may have outsized case expansion. Dropping a sized case into a case gauge is a quick way to ensure you won’t have chambering problems.
 

AK_Skeeter

Senior Member
Joined
Jan 3, 2020
Messages
379
Location
Becker Ridge, Alaska
Buy a Wilson case gauge if you are worried about it. If your buddies rifle has a sloppy chamber, yes, you may have outsized case expansion. Dropping a sized case into a case gauge is a quick way to ensure you won’t have chambering problems.
If you purchase their micrometer, you can also set your shoulder bump when full-length resizing .
Wilson case gauge/micrometer and a case fired from your chamber.
 

rayporter

Senior Member
Joined
Jul 3, 2014
Messages
3,185
Location
arkansas or ohio
Short answer, maybe. If his chamber is the same or smaller than yours you're gtg.

If your chamber is smaller that your buddies and his cases expanded at the base you won't be able to resize that far down the case and they'll either chamber very tightly or not at all. Bumping shoulders back is not big deal. Case body expansion is a big problem.
pretty much gets the high points here.

about 95% of the time one shot is not enough to get a case to fill out in the chamber. it needs hammered a few times to fill the chamber. those first few shots i will neck size for paper punching and then full length size when needed.

in short range BR it can be demonstrated that a case not filling a chamber is detrimental to accuracy. for hunting rifles you must have clearance.
 
OP
NorCalBowHuntr916

NorCalBowHuntr916

Senior Member
Joined
Jun 14, 2019
Messages
156
Buy a Wilson case gauge if you are worried about it. If your buddies rifle has a sloppy chamber, yes, you may have outsized case expansion. Dropping a sized case into a case gauge is a quick way to ensure you won’t have chambering problems.
I full length sized them and bumped the shoulders back to the same as my brass. I chambered them this morning and they went right in. Question is will they shoot the same?
 
OP
NorCalBowHuntr916

NorCalBowHuntr916

Senior Member
Joined
Jun 14, 2019
Messages
156
I bumped the shoulder back with a hornady headspace gauge. Its the same thing as the Wilson gauge isn't it?
 

wind gypsy

Senior Member
Joined
Dec 30, 2014
Messages
4,154
I get the feeling some people are using "FL sizing" and "bumped the shoulders back" as the same thing and some folks are using "FL sizing" as the sizing die being bottomed out on the shell holder..
I full length sized them and bumped the shoulders back to the same as my brass. I chambered them this morning and they went right in. Question is will they shoot the same?

It's impossible to say. I'd bet they shoot pretty damn close if not the same but there's a small chance that wont be the case.
 

bbassi

Member
Joined
Sep 3, 2019
Messages
77
I didn't think target shooters were only neck sizing.
Please point out where I said only, or mentioned anyone other than myself. We'll wait.
Meanwhile, some here might find this video interesting. I know for myself I could only dream to shoot on this level.
 

Trippy

Senior Member
Joined
Jul 27, 2016
Messages
121
Location
SW Wisconsin
Please point out where I said only, or mentioned anyone other than myself. We'll wait.
Meanwhile, some here might find this video interesting. I know for myself I could only dream to shoot on this level.
Easy now, your statement I replied to I read as "I neck size for my target rifle but FL size for my hunting rifle"...in short. My bad.
 
Top