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Resizing new brass?
#4618217
10/01/13 02:46 AM
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Joined: Oct 2010
Posts: 488
Birdog62
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Bird Dog
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Is it necessary to resize new unfired brass? I'm new to reloading and have only reloaded used brass so this may sound like a dumb question. Also, reloading 300 win mag, do I need to use magnum primers? The load manual doesn't specify which primers.
"Many of the problems we face today came about because the people who WORK for a living are outnumbered by the people who VOTE for a living."
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Re: Resizing new brass?
[Re: Birdog62]
#4618272
10/01/13 02:54 AM
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Joined: Jan 2009
Posts: 1,590
cory_cooper
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does the brass measure to spec? in not it need to be resized. Are the mouth perfectly round if not you need to resize or at least neck size. What manual are you using, I have yet to see one that did not specify primer. I would imagine that most if not all the powders in the burn range used for the 300 WM in that large a charge weight would greatly benefit from a magnum primer
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Re: Resizing new brass?
[Re: cory_cooper]
#4618380
10/01/13 03:11 AM
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Joined: Oct 2010
Posts: 488
Birdog62
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does the brass measure to spec? in not it need to be resized. Are the mouth perfectly round if not you need to resize or at least neck size. What manual are you using, I have yet to see one that did not specify primer. I would imagine that most if not all the powders in the burn range used for the 300 WM in that large a charge weight would greatly benefit from a magnum primer Thanks Cory, after reading your post I went back and looked at the manual and I was overlooking the primer recommendation in the cartridge specs. Thanks for pointing that out. I haven't measured the cases yet just got them. I'll open and inspect them tomorrow.
"Many of the problems we face today came about because the people who WORK for a living are outnumbered by the people who VOTE for a living."
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Re: Resizing new brass?
[Re: Birdog62]
#4618483
10/01/13 03:24 AM
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Joined: Apr 2009
Posts: 4,975
jbd76266
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I always full length size new brass. Bulk bags always have out of round/ dinged necks.
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Re: Resizing new brass?
[Re: jbd76266]
#4618543
10/01/13 03:34 AM
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Joined: Jan 2009
Posts: 1,590
cory_cooper
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I always full length size new brass. Bulk bags always have out of round/ dinged necks. yes, but I have reloaded brass from nosler, norma, and lapua that did not need resizing, I have also reloaded brass from norma, lapua, Winchester, Remington, starline, and frontier that was in desperate need of resizing.
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Re: Resizing new brass?
[Re: jbd76266]
#4618753
10/01/13 05:24 AM
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Joined: Apr 2010
Posts: 14,199
tth_40
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I always full length size new brass. Bulk bags always have out of round/ dinged necks. +1. I don't care who the brass manufacturer is. If it's on my bench it's going to be full length sized for the first firing.
Never underestimate the power of stupid people in large numbers
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Re: Resizing new brass?
[Re: tth_40]
#4618824
10/01/13 10:45 AM
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Joined: Apr 2010
Posts: 6,219
dee
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I always size, chamfer/debur and debur flash holes on the orimer pockets.
"A vote is like a rifle; it's usefulness depends on the character of the user" Theodore Roosevelt
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Re: Resizing new brass?
[Re: dee]
#4618894
10/01/13 12:04 PM
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Joined: Oct 2006
Posts: 4,200
dawaba
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I always size, chamfer/debur and debur flash holes on the orimer pockets. I once was anal-retentive about deburring flash holes, as well as neck-turning new brass. I no longer bother with this on hunting loads for sporter rifles. The results are simply not worth the time and effort. I will admit that bench and LR guns probably will benefit from these steps, but that's another game altogether. However, I DO run new brass through a FL sizer that is adjusted for my rifle's chamber. Almost everyone recommends Mag primers in the .300 Winnie. Not being one to buck the system, I do too.
"For every complex problem there is an answer that is clear, simple.....and wrong." H. L. Mencken
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Re: Resizing new brass?
[Re: dawaba]
#4621583
10/02/13 01:51 AM
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Joined: Jun 2013
Posts: 6,578
Wburke2010
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I also always resize new brass.
Walter
MW Ranch Services 903-303-4523 Metal buildings, welding, equipment repair, dirt work
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Re: Resizing new brass?
[Re: Wburke2010]
#4621634
10/02/13 02:02 AM
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Joined: Nov 2007
Posts: 9,528
RiverRider
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New brass oughta be ready to load, but it often is not due to dinged case mouths---just as others are saying. I suppose you could just run the expander ball down into the neck, but I've always figured if I'm gonna go that far I might as well just resize all the way, but in a die as finely adjusted for my rifle as possible.
I really don't think a .300 Win Mag calls for a magnum primer based on it's size alone, but when you're using those "hard-to-ignite" powders and especially in cold weather it's probably not a bad idea. On the other hand you can use magnum primers in any cartridge you want and it won't hurt a thing. Use em if you got em, and choose em if you like em. You won't be handicapping yourself at all.
"Arguing with you always makes me thirsty." -Augustus McRae
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Re: Resizing new brass?
[Re: dawaba]
#4621761
10/02/13 02:45 AM
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Joined: Apr 2010
Posts: 6,219
dee
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I always size, chamfer/debur and debur flash holes on the orimer pockets. I once was anal-retentive about deburring flash holes, as well as neck-turning new brass. I no longer bother with this on hunting loads for sporter rifles. The results are simply not worth the time and effort. I will admit that bench and LR guns probably will benefit from these steps, but that's another game altogether. However, I DO run new brass through a FL sizer that is adjusted for my rifle's chamber. Almost everyone recommends Mag primers in the .300 Winnie. Not being one to buck the system, I do too. I do the primer flash hole debur out of habit after having a batch or two of brass that was horrible. Now all brass get the same treatment.
"A vote is like a rifle; it's usefulness depends on the character of the user" Theodore Roosevelt
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Re: Resizing new brass?
[Re: Birdog62]
#4621810
10/02/13 02:59 AM
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Joined: Dec 2008
Posts: 41,258
J.G.
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I full length size EVERY time, including new brass. I also measure ten pieces and set the trimmer to the longest I can get, and still get a square mouth, and I always debur the Flash hole. I've seen lots of pieces of brass with case mouths badly dented, so they need attention anyway.
The 300 Win Mag needs Magnum primers, like CCI 250.
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Re: Resizing new brass?
[Re: J.G.]
#4621831
10/02/13 03:06 AM
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Joined: Jan 2011
Posts: 46,950
Gravytrain
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Never ever do I touch new brass anymore. Did it all at first with new brass, the whole nine yards. Then one time I was in a hurry and did nothing. Guess what. The groups were exactly the same as when I did all that work. So now I still do the Work, but I wait until the second loading.
I do not reload any magnums, not sure if that would impact anything. Oh and I use 308 or 223 Winchester brass.
Last edited by Gravytrain; 10/02/13 03:07 AM.
Upon us all, upon us all, a little rain must fall
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Re: Resizing new brass?
[Re: Gravytrain]
#4622123
10/02/13 09:54 AM
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Joined: Jun 2006
Posts: 8,388
Dave Davidson
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A couple of years ago I bought some new 243 brass from Cabelas. It was either Rem or Win. I loaded without resizing. The bullets were loose in the neck.
I now resize every time.
Without a sense of urgency, nothing ever happens.
Boy, if I say "sic em", you'd better look for something to bite. Sam Shelley, Rancher Muleshoe Texas 1892-1985 RIP
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Re: Resizing new brass?
[Re: Dave Davidson]
#4622206
10/02/13 11:34 AM
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Joined: Jan 2011
Posts: 2,273
boonee
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Yep! always, on new brass.
Avenger Firearms 214-577-5818 avengerfirearms@gmail.com
Lifetime NRA member
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Re: Resizing new brass?
[Re: boonee]
#4622303
10/02/13 12:34 PM
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Joined: Sep 2009
Posts: 664
KillinSwede
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I have a checklist that I use with every reloading cycle. I resize new brass and used brass just to be safe.
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Re: Resizing new brass?
[Re: KillinSwede]
#4622355
10/02/13 12:54 PM
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Joined: Aug 2011
Posts: 13,416
jdk1985
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Re: Resizing new brass?
[Re: jdk1985]
#4622903
10/02/13 03:05 PM
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Joined: Oct 2010
Posts: 488
Birdog62
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Well, I opened the new brass and inspected each case and it's just like the majority of you guys said, dented case mouths, burrs, etc. the lengths were pretty matched but if I have to run the expander ball I might as well finish the stroke and FL resize. Thanks for all the help, you guys are great.
"Many of the problems we face today came about because the people who WORK for a living are outnumbered by the people who VOTE for a living."
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Re: Resizing new brass?
[Re: Birdog62]
#4624533
10/02/13 09:35 PM
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Joined: Feb 2011
Posts: 281
JesterGrin_1
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When Full Length resizing be careful as to not push the shoulder back.
I like to smoke the neck and shoulder and run it up into the die and stop a little short from the shoulder.
Last edited by JesterGrin_1; 10/02/13 09:37 PM.
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Re: Resizing new brass?
[Re: JesterGrin_1]
#4625566
10/03/13 02:13 AM
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Joined: Dec 2008
Posts: 41,258
J.G.
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When Full Length resizing be careful as to not push the shoulder back.
I like to smoke the neck and shoulder and run it up into the die and stop a little short from the shoulder. I disagree. A 3 thousandth bump of the shoulder ensures reliability chambering and ejecting. It also doesn't cause the load to lose any velocity.
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Re: Resizing new brass?
[Re: J.G.]
#4626047
10/03/13 10:39 AM
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Joined: Apr 2010
Posts: 6,219
dee
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When Full Length resizing be careful as to not push the shoulder back.
I like to smoke the neck and shoulder and run it up into the die and stop a little short from the shoulder. I disagree. A 3 thousandth bump of the shoulder ensures reliability chambering and ejecting. It also doesn't cause the load to lose any velocity. I agree while I do just neck size some of the calibers I reload all hunting rounds get fl sized. The last thing I want is to have a round not reliably chamber while im in the field.
"A vote is like a rifle; it's usefulness depends on the character of the user" Theodore Roosevelt
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Re: Resizing new brass?
[Re: dee]
#4656460
10/13/13 11:03 PM
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Joined: Feb 2011
Posts: 281
JesterGrin_1
Bird Dog
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Bird Dog
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Full length sizing is ok. Just be careful not to push the shoulder back that would increase head space.
I should have added that calibers that I mainly neck size is regulated to that single fire arm of which they were fired from.
Each chamber is a law unto itself.
Last edited by JesterGrin_1; 10/13/13 11:05 PM.
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Re: Resizing new brass?
[Re: JesterGrin_1]
#4658484
10/14/13 04:51 PM
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Joined: Dec 2009
Posts: 14
TenX
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Light Foot
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I, like someone suggested, used to always deburr flash holes. Recently, I had a conversation with the man who ran Winchesters accuracy department before he retired and he told me that deburring flash holes was a complete waste of time and effort.
I was happy to hear that since that is one job I hate the most. Phil
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Re: Resizing new brass?
[Re: tth_40]
#4658603
10/14/13 05:31 PM
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Joined: Oct 2013
Posts: 757
fast88
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I always full length size new brass. Bulk bags always have out of round/ dinged necks. +1. I don't care who the brass manufacturer is. If it's on my bench it's going to be full length sized for the first firing. +2
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Re: Resizing new brass?
[Re: TenX]
#4659370
10/14/13 09:39 PM
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Joined: Dec 2008
Posts: 41,258
J.G.
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I, like someone suggested, used to always deburr flash holes. Recently, I had a conversation with the man who ran Winchesters accuracy department before he retired and he told me that deburring flash holes was a complete waste of time and effort.
I was happy to hear that since that is one job I hate the most. Phil Hmm. I wonder why it is very rare for mass produced ammunition to shoot more consistently than perfectly tuned hand-loads. He's full of chit!
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