which step is the proper first step ? i have new brass (308) and iam not sure if i should trim first then fire form, or fire form then trim ?
my guess: fire first then trim
my guess: fire first then trim
new brass: trim first or fire form then trim ?
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Re: new brass: trim first or fire form then trim ?
Depends on what you are trying to get out of that first firing. If you aren't looking for minute of gnat accuracy, you are better off tot fire then trim. I you want that first bunch perfect, you have to at least check length.
Depends on what you are trying to get out of that first firing. If you aren't looking for minute of gnat accuracy, you are better off tot fire then trim. I you want that first bunch perfect, you have to at least check length.
Re: new brass: trim first or fire form then trim ?
When I fireform for .50DTC I trim first, fire, then trim again.
When I fireform for .50DTC I trim first, fire, then trim again.
Re: new brass: trim first or fire form then trim ?
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Outsy</div><div class="ubbcode-body">did you try a search? </div></div>
absolutely not.
hmm trim, fire, trim sounds like a good plan
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Outsy</div><div class="ubbcode-body">did you try a search? </div></div>
absolutely not.
hmm trim, fire, trim sounds like a good plan
Re: new brass: trim first or fire form then trim ?
I fireform my brass before I even consider it brass.
Perhaps I'm just a little OCD... I chamfer the primer flash hole and outside cleanup my necks (so I *know* they're concentric). Both of these use the case mouth as the datum. I like to fire the case and have it *exactly* formed to my chamber, *then* do that work. Now I know *exactly* where the neck meets the shoulder (for neck turning) and after length trimming all the cases have exactly the same datum for neck turning and flash hole deburr.
Yes it gives me warm fuzzies.
John
I fireform my brass before I even consider it brass.
Perhaps I'm just a little OCD... I chamfer the primer flash hole and outside cleanup my necks (so I *know* they're concentric). Both of these use the case mouth as the datum. I like to fire the case and have it *exactly* formed to my chamber, *then* do that work. Now I know *exactly* where the neck meets the shoulder (for neck turning) and after length trimming all the cases have exactly the same datum for neck turning and flash hole deburr.
Yes it gives me warm fuzzies.
John
Re: new brass: trim first or fire form then trim ?
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: The Mechanic</div><div class="ubbcode-body">When I fireform for .50DTC I trim first, fire, then trim again. </div></div>
This is pretty much what a BR guy told me.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: The Mechanic</div><div class="ubbcode-body">When I fireform for .50DTC I trim first, fire, then trim again. </div></div>
This is pretty much what a BR guy told me.
Re: new brass: trim first or fire form then trim ?
To make it a bit longer I do all of my brass prep, as in clean, deprime if not virgin brass, and clean, primer pocket uniform, flash hole uniform, anneal, size, trim, chamfer, prime, load, and shoot. Then for new fired brass I do a water volume test sort, anneal, size, trim and bang time for grouping.
http://www.snipershide.com/forum/ubbthre...793#Post1162793
To make it a bit longer I do all of my brass prep, as in clean, deprime if not virgin brass, and clean, primer pocket uniform, flash hole uniform, anneal, size, trim, chamfer, prime, load, and shoot. Then for new fired brass I do a water volume test sort, anneal, size, trim and bang time for grouping.
http://www.snipershide.com/forum/ubbthre...793#Post1162793
Re: new brass: trim first or fire form then trim ?
The only time IMHO to trim new brass is when neck turning is done, this is done to so each piece of brass is exactly the same so the turner will cut into the shoulder exactly the same everytime.
The only time IMHO to trim new brass is when neck turning is done, this is done to so each piece of brass is exactly the same so the turner will cut into the shoulder exactly the same everytime.
Re: new brass: trim first or fire form then trim ?
I fireform and then trim... i would only do otherwise if the virgin brass was above max length.
Once fireformed, i then trim them all on the LE Wilson and then sort them by weight.
I fireform and then trim... i would only do otherwise if the virgin brass was above max length.
Once fireformed, i then trim them all on the LE Wilson and then sort them by weight.
Re: new brass: trim first or fire form then trim ?
My fireforming really changes the brass. It needs .10 off the length for .50DTC so trimming is mandatory.
My fireforming really changes the brass. It needs .10 off the length for .50DTC so trimming is mandatory.
Re: new brass: trim first or fire form then trim ?
their are a lot of good points here, when fire forming do you at all see how your rifles are grouping with new brass ?
do you load ( in a 308 ) subsonic "practice" loads just to save on your powder or full loads ? i know this sounds like a stupid question but it would be a shame to wast good smk's on fire formed brass as well as good powder.
maybe loading some surplus bullets and have a pound of cheap powder around.
well I have 200 winchester casings that are new and i still dont know if i wanna trim them first or load them up and shoot them first.
thanks for all the advice so far though
their are a lot of good points here, when fire forming do you at all see how your rifles are grouping with new brass ?
do you load ( in a 308 ) subsonic "practice" loads just to save on your powder or full loads ? i know this sounds like a stupid question but it would be a shame to wast good smk's on fire formed brass as well as good powder.
maybe loading some surplus bullets and have a pound of cheap powder around.
well I have 200 winchester casings that are new and i still dont know if i wanna trim them first or load them up and shoot them first.
thanks for all the advice so far though
Re: new brass: trim first or fire form then trim ?
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: 427Cobra</div><div class="ubbcode-body">The only time IMHO to trim new brass is when neck turning is done, this is done to so each piece of brass is exactly the same so the turner will cut into the shoulder exactly the same everytime. </div></div>
Excellent point!
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: 427Cobra</div><div class="ubbcode-body">The only time IMHO to trim new brass is when neck turning is done, this is done to so each piece of brass is exactly the same so the turner will cut into the shoulder exactly the same everytime. </div></div>
Excellent point!
