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Fire forming new brass (Read 472 times)

Babydriver Senior Forum Member Offline Posts: 280 Joined: Mar 22^nd, 2024	Fire forming new brass Sep 17^th, 2026 at 8:37am	Print Post
	‘Ve been told, anneal the brass, fill with powder and som cream of wheat. How much of each


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silver Senior Forum Member Offline Posts: 256 Location: Central wi, Joined: Sep 20^th, 2016	Re: Fire forming new brass Reply #1 - Sep 17^th, 2026 at 8:49am	Print Post
	I use 7-10 grains pistol powder fill with corn meal and seat a wad on top of that . Fire in back yard.


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westerner Frequent Elocutionist Offline deleted posts and threads record holder. Posts: 12554 Location: Why, out West of course Joined: May 29^th, 2006	Re: Fire forming new brass Reply #2 - Sep 17^th, 2026 at 9:12am	Print Post
	120 gr bullet and 57 gr 4064 fire formed these very nicely.

	A blind squirrel runs into a tree every once in a while.
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calledflyer Frequent Elocutionist Offline Posts: 4053 Joined: Mar 9^th, 2015	Re: Fire forming new brass Reply #3 - Sep 17^th, 2026 at 10:06am	Print Post
	as above, a 'normal' load, or factory ammo, works in my .280 imp. sometimes the accuracy is just as good as the formed cases. they do last much longer if neck sized alone afterward. years ago I did that cream of wheat deal shooting upwards and was disgusted by the rain of crap returning to earth and the nasty odor.


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marlinguy Frequent Elocutionist Offline Ballards may be weaker, but they sure are neater! Posts: 18273 Location: Oregon Joined: Feb 2^nd, 2009	Re: Fire forming new brass Reply #4 - Sep 17^th, 2026 at 10:12am	Print Post
	Fire forming with reduced loads is only done when the brass needs a fair amount of forming. If it's close to the final dimensions just load it with your correct charge and a bullet and it's good. I open up the necks of my 9.3x74R brass to .410" with my M die expander, then charge the case and seat the bullets. Fire them like usual, and they're great. They have a wasp like waist after expanding, but shoot very accurately when fire forming them. I do the same with .303 British brass I chop off and expand for .40-50SS. They shoot great with my loads and finish forming.

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sharps4590 Full Member Offline Posts: 147 Joined: Mar 24^th, 2016	Re: Fire forming new brass Reply #5 - Sep 17^th, 2026 at 1:27pm	Print Post
	marlinguy wrote on Sep 17^th, 2026 at 10:12am: Fire forming with reduced loads is only done when the brass needs a fair amount of forming. If it's close to the final dimensions just load it with your correct charge and a bullet and it's good. I open up the necks of my 9.3x74R brass to .410" with my M die expander, then charge the case and seat the bullets. Fire them like usual, and they're great. They have a wasp like waist after expanding, but shoot very accurately when fire forming them. I do the same with .303 British brass I chop off and expand for .40-50SS. They shoot great with my loads and finish forming. There's a tidbit of info that might come in handy. 40-50SS can be made from 303 Brit or 30-40 Krag..great! In two weeks there's an auction with an original rolling block that is described as excellent in 40-50SS and I hadn't done any research. So, thanks for answering the question before I asked it or spent time digging it out!!


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marlinguy Frequent Elocutionist Offline Ballards may be weaker, but they sure are neater! Posts: 18273 Location: Oregon Joined: Feb 2^nd, 2009	Re: Fire forming new brass Reply #6 - yesterday at 11:15am	Print Post
	sharps4590 wrote on Sep 17^th, 2026 at 1:27pm: [quote author=383427393C3B32202C550 link=1789648629/4#4 date=1789654339] There's a tidbit of info that might come in handy. 40-50SS can be made from 303 Brit or 30-40 Krag..great! In two weeks there's an auction with an original rolling block that is described as excellent in 40-50SS and I hadn't done any research. So, thanks for answering the question before I asked it or spent time digging it out!! A quick chop with my mini chop saw, and then clean up the cut and expand to .410" for my guns. Then after expanding I final trim them and they're ready to load with my powder and bullet. (You need to *Login* or *Register* to view media files and links) (You need to *Login* or *Register* to view media files and links) (You need to *Login* or *Register* to view media files and links) C&H4D just did a run of dies for the .40-50SS and I got a set earlier this summer.

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sharps4590 Full Member Offline Posts: 147 Joined: Mar 24^th, 2016	Re: Fire forming new brass Reply #7 - yesterday at 11:29am	Print Post
	What weight bullet are you using? I have 2, 40 cal. molds, Lyman's 410 gr. and an Accurate 260 gr.


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marlinguy Frequent Elocutionist Offline Ballards may be weaker, but they sure are neater! Posts: 18273 Location: Oregon Joined: Feb 2^nd, 2009	Re: Fire forming new brass Reply #8 - yesterday at 11:32am	Print Post
	sharps4590 wrote yesterday at 11:29am: What weight bullet are you using? I have 2, 40 cal. molds, Lyman's 410 gr. and an Accurate 260 gr. I'd use the lighter bullet. I'm using an RCBS CSA 300 gr. in mine. I have also used the same mold in 350 gr., but didn't see any difference out to 500 yds.

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Schuetzendave Frequent Elocutionist Offline Retired Ex-Shooter Posts: 4258 Location: St. Albert, Alberta Joined: Jan 28^th, 2005	Re: Fire forming new brass Reply #9 - yesterday at 12:03pm	Print Post
	I use 30 Krag cases blown out with HS-6 shotgun powder. You use half of a load to make a 12 gauge shotgun shell. A low pressure shotgun shell is 32 grains of HS-6. I use 16 grains of HS-6 with the annealed case then filled with cream of wheat to blow out my cases to make .40-60 Maynard cases. You can load the cases upright when loading to not dump the powder, or place a wad (foam or cardboard) to hold the cream of wheat and powder in the case before firing. I do it out on the range but some guys just fire it into a bucket in their basement - when the wife is not home.
	« Last Edit: Today* at 9:55am by Schuetzendave* »

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sharps4590 Full Member Offline Posts: 147 Joined: Mar 24^th, 2016	Re: Fire forming new brass Reply #10 - yesterday at 3:31pm	Print Post
	When fire forming cases I'll use any of a few shotgun/revolver powders and for a filler I like corn cob media. It can be a lot of fun in the summer, if you're not in a hurry. You turn the fire forming into a flying insect hunt, wasps, hornets, yellow jackets, wood borers and maybe bumble bees. Bumble bees are usually pretty benign and I'll leave them alone but, the others, I do not like them. When you hit one you won't be picking up pieces to mount, they simply disentegrate!


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marlinguy Frequent Elocutionist Offline Ballards may be weaker, but they sure are neater! Posts: 18273 Location: Oregon Joined: Feb 2^nd, 2009	Re: Fire forming new brass Reply #11 - yesterday at 7:58pm	Print Post
	As you can see from the last picture I posted, once you expand the necks to .40 caliber there's not much left to fire form. So I just load my powder and bullet and shoot them. I've shot the unformed cases along with previously formed cases and the groups don't vary in size shooting either.

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calledflyer Frequent Elocutionist Offline Posts: 4053 Joined: Mar 9^th, 2015	Re: Fire forming new brass Reply #12 - Today at 9:48am	Print Post
	Sharps4590, where'n heck do you live that is so bug-ridden that you can wander around in the back yard shooting enough moths and butterflies to form even a single box of shells without taking all day? I could never get the job over with soon enough when it needed to be done. Like hauling out the trash or something.


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sharps4590 Full Member Offline Posts: 147 Joined: Mar 24^th, 2016	Re: Fire forming new brass Reply #13 - Today at 1:04pm	Print Post
	I don't wander around, I step out the shop door and fire form them standing on the patio and if something shows up I try to bust it. We're right down in the woods and there's usually one or two miscreants flying around the wife's flower beds back there. Over the years I doubt I've killed 20 insects, mostly wasps or wood borers looking to bore into the deck joists over the patio. It always makes me laugh.


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calledflyer Frequent Elocutionist Offline Posts: 4053 Joined: Mar 9^th, 2015	Re: Fire forming new brass Reply #14 - Today at 2:45pm	Print Post
	OK, I wondered about that earlier post- it sorta sounded like it was next thing to a full safari with porters and all. I never tried to aim a forming load (not that I did a zillion of them), just up in the air at the range and retreat to home.


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