chamfer before sizing?

reaper4

reaper4

New member
ok i have been chamferring all my brand new federal cases for months BEFORE i run them through my fl size die. am i causing damage to anything? i just read a ton of posts about the topic and have come to the conclusion that i should not be doing any case mouth prep before i fl size. I just figured a chamfer before going through a size die couldnt hurt. could it?
 
got ya i was just told never to trim new cases until you fire them once first. was going to fire all of them then go though the trimming and all that
 
for rifles, I resize -including new brass- then check for case separation (not for new brass).

then:

Clean or uniform primer pockets.
Debur flash holes (new brass).
Trim to length, debur & chamfer. For calibers it's available for I use a 3 way head on my cutter that trims/deburs/chamfers all in one.
 
Why are you sizing new brass? You are working your brass, shortening it's life, for no reason. If a neck is dinged up in shipping, a short pass on the neck is all that's needed.
 
Originally Posted By: ninehorsesWhy are you sizing new brass? You are working your brass, shortening it's life, for no reason. If a neck is dinged up in shipping, a short pass on the neck is all that's needed.

Ah, you really aint working it that much. I mean, it is already sized to chamber and all you would be doing is getting a few of those little dents that are in almost every bag out of the cases and necks.

I never used to run new bottleneck brass through a sizer before loading it but I have done so for the last few years. Seems to work better for me anyway.
 
Originally Posted By: ninehorses"aint working it that much"

Try running it in there with no lube. You might as well be buying once fired brass!

In a bag of 50 brass I will lube 10 of them. I will run 4 dry and one lubed case though my die. No need to lube them all as they are not even getting sized at all. Works great for me.
 
If I have any out of round, I will just run it into the die far enough to hit the expander, then back out. I will not touch any other part of the brass.
 
To each their own I f/l size all my new brass it was the way I was taught it may work the brass but some of the new brass I have bought latey has been ruff and needed it imo but I'm no expert
 
just wondering if chamfering before i size is going to hurt anything? and one more little question. i just measured my cases, they all come brand new right around 1.740 that seems way too short.
 
Originally Posted By: reaper4just wondering if chamfering before i size is going to hurt anything? and one more little question. i just measured my cases, they all come brand new right around 1.740 that seems way too short.

Yeah they are short. Don't worry they'll grow up.

Greg
 
Usable capacity will be the same. Its always best to use once fired for load work ups. You won't see any quantifiable difference.

Greg
 
Originally Posted By: pokeyjeeperTo each their own I f/l size all my new brass it was the way I was taught it may work the brass but some of the new brass I have bought latey has been ruff and needed it imo but I'm no expert

Yeah, makes my brass more uniform and my loads seem to be better for it.

I started sizing my new cases before after I noticed a lot of semi-deformed cases in a bag of .220 Swift brass. Some of it looked as if it had been stepped on.

If I were using some high end brass like Lapua I doubt that I would bother. But I don't even have any of it so a quick pass though my sizing die is what I do when I'm using new brass. But I haven't bought any brass in a few years now. Stocked up a while back and still using it. Glad I did and am.
 
New cases always* have dings in the mouths, Lapua probably the likely exception. I would not use a perfectly round sharp champfer tool to cut material from an out-of-round case mouth. You're going to remove brass inconsistently, depending on the size and location of the dents. I'd want the case mouth to be round first before I started removing material. Why? Because CONSISTENCY matters. It won't blow up your gun or anything like that, but if you are going to do it, why not do it CORRECTLY?

There's a reason all manuals follow the same basic step by step procedure. There's a reason the steps are in a particular order.

I also would not "partially" size the necks, because CONSISTENCY matters, how does that effect neck tension, and how inconsistent is your batch if you only partially sized SOME of the case mouths but not others? No thanks. I want every single piece of brass to be clones of each other, as close to identical as I can get them. That means sending them all through the same exact prep process every single time. And it's not that hard to just do it right vs taking shortcuts.
 
Originally Posted By: pahntr760If I have any out of round, I will just run it into the die far enough to hit the expander, then back out. I will not touch any other part of the brass.
What he said !
 
well now im sitting here with 100 brand new cases that are at 1.740 (thats how they came new) and were chamferred then sized. should i just use them as plinking rounds and break out another 100 new cases for accuracy loads or will these be ok until i fire them and start the process over?
 


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