Question for sizing of new brass

caporal

caporal

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Hi Everyone

I finnally found 7,62 x 54R brass, the only available I found are Lapua @ 76$ per 100. Ok costly but should the best on market!
Now since this is the first time I bought new brass My question is:
Usually is it necessary to full lenght size & cut to lenght before reloading or they are already ready to load????
As matter of safety I will do both but as far as I know, all sizing reduce case life so...

Larry"Caporal"Marcotte
 
I only neck size the brass because I find that even Lapua brass can have out of round necks from being roughly handled. But you definitely don't need to full length size it/trim. But you will need to chamfer the brass depending on the bullet you are using (i.e. Boat tail vs flat base) as it can remove some of the jacket if you are not careful.
 
Unless you want to go thru the tedium of chambering every one of them to make sure they fit your gun without resistance, I'd resize and trim them to the same length then chamfer. I'd also sort them by weight first - if you're using Lapua new brass might as well get them to "be all they can be"! It's after the first firing they'll show you what they're made of...
 
Unless you want to go thru the tedium of chambering every one of them to make sure they fit your gun without resistance, I'd resize and trim them to the same length then chamfer. I'd also sort them by weight first - if you're using Lapua new brass might as well get them to "be all they can be"! It's after the first firing they'll show you what they're made of...
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I sort new brass by weight and put them into separate boxes. Why not?

I do this for target rifles. Don't think I would bother for a milsurp, though.

For new cases I neck size, to make them round and then champfer the mouths. Did 200 last night using a taper reamer mounted on an electril drill in a vice.
 
I full length size,measure and trim if needed.
Don't forget to inspect the flash holes.I've found some that were too large or too small.
 
New brass will have the same dimensions as factory loaded ammo. For those people who full length resize the new brass, do you do the same thing before you fire factory loaded cartridges?
I take new brass and prime it. Then I load it with powder and seat a bullet. Never had a speck of trouble in over 45 years of reloading many different calibres.
The only exception is when loading cast bullets, when the mouth must be belled with the proper die.
 
Actually the last lot of Lapua brass,which I bought 7 yrs ago,is labelled 7.62x53-1mm shorter than the nominal 7.62x54.It is excellent brass and works very well in the MN rifles.Best bet with new brass is to necksize to ensure concentric case mouths,trim all cases to uniform length,then chamfer and deburr prior to loading.I go the extra steps to deburr flash holes,uniform primer pockets,and sort by weight. As I recall, the Lapua brass has drilled,rather than punched, flash holes,which eliminates the need to debur the flash holes on the interior side.Same with other Scandanavian made brass, incl Norma and Sako.You will often find a percentage of out of round case mouths in bulk lots of new brass.This comes from handling after manufacture.
 
Thanks

Thanks for all infos

Last evening I carefully inspect all brass from the box & in discover that many necks are out of round as some of you said!

I test charber about 10 cases & all of them load like a charm.

Altough one case had a serious flaw that make me reject it:

BRASS-01.jpg


It is like a light bulge made during forming.

My conclusion: a serious & careful inspection is mandatory

Thanks again

Larry"Caporal"Marcotte
 
Looks like the bulk remington brass I've bought. They're always rough. Dings and knicks in the cases so I figure I better resize everything before I start.
 
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