Fire forming 280 AI brass
02-26-2010, 07:55 AM
#1
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Fire forming 280 AI brass
better done with normal factory loaded ammunition or load lighter 280 rounds in new 280 brass..?
Obviously new 280 AI Norma brass is the way to go, just curious about fire forming..
Obviously new 280 AI Norma brass is the way to go, just curious about fire forming..
02-26-2010, 02:01 PM
#2
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Ackley improved cartridges are designed to headspace .004" shorter than the parents, so you can shoot 280 factory ammo, or use cornmeal and a papertowel plug if ya don't wanna waste bullets. here's how I turn 270 win cases into 6.5 Gibbs cases
resize to a crush fit in the 6.5 chamber
prime and charge with 11 gr of unique, put a finger over the case mouth and tap once on the bench to settle the powder
fill the case to the top of the case neck with corn meal, put a finger over the casemouth and tap once or so to settle the cornmeal to the bottom of the case neck
now tear a 1.5" wide strip off a paper towel and twist it into a skinny worm, stick it into the case neck, wad it in till full then pinch it off, use a small punch to pack the plug in tight.
keep muzzle pointed down, if you have a brake remove it, watch barrel heat (cause it'll get hot!) clean your barrel well when done, shoulders should come out just rounded on the edges, but will sharpen up nicely on the first full power firing.
RR
resize to a crush fit in the 6.5 chamber
prime and charge with 11 gr of unique, put a finger over the case mouth and tap once on the bench to settle the powder
fill the case to the top of the case neck with corn meal, put a finger over the casemouth and tap once or so to settle the cornmeal to the bottom of the case neck
now tear a 1.5" wide strip off a paper towel and twist it into a skinny worm, stick it into the case neck, wad it in till full then pinch it off, use a small punch to pack the plug in tight.
keep muzzle pointed down, if you have a brake remove it, watch barrel heat (cause it'll get hot!) clean your barrel well when done, shoulders should come out just rounded on the edges, but will sharpen up nicely on the first full power firing.
RR
Might be easier to just shoot some core-loks, at least just for a little pointless range time...Could any accuracy, even remotely, be expected?
02-26-2010, 02:55 PM
#3
Nontypical Buck
Join Date: Aug 2005
Location: S.W. Pa.-- Heart in North Central Pa. mountains-
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So would you expect better results after the second full power firing? Essentially the first full power load would finish the job of the cornmeal and paper towel. Correct?
Might be easier to just shoot some core-loks, at least just for a little pointless range time...Could any accuracy, even remotely, be expected?
Might be easier to just shoot some core-loks, at least just for a little pointless range time...Could any accuracy, even remotely, be expected?
........
02-26-2010, 05:41 PM
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02-26-2010, 06:37 PM
#7
Nontypical Buck
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02-27-2010, 04:05 AM
#8
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RR-
Great pix..so you are actually chambering the empty case to crush fit or is that the done with a resizer die? You ever have a problem with blown shoulders shooting factory rounds instead of the cornmeal process?
So essentially it would go through this order......(sans the blown shoulder)
Great pix..so you are actually chambering the empty case to crush fit or is that the done with a resizer die? You ever have a problem with blown shoulders shooting factory rounds instead of the cornmeal process?
So essentially it would go through this order......(sans the blown shoulder)
02-27-2010, 09:49 AM
#10
Nontypical Buck
Join Date: Aug 2005
Location: S.W. Pa.-- Heart in North Central Pa. mountains-
Posts: 2,600
Personally, Remington is about my last choice for brass, period. It just doesn't seem as ductile as most others. For going on the "cheap", I'll take Winchester brass..........