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Old 12-08-2006, 07:29 PM   #1
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Converting Brass from one caliber to another caliber

Hey guys, I heard of coverting 284 Win to 7.5x55 Swiss and it makes me wonder, "What other calibers can be done the same way?"

So, how about making a list of what you guys know? Here's what I know off the top of my head:

284 Win to 7.5x55 Swiss
.357 Mag to .38 Sp
30-06 to 7.7 Japanese
.32 S&W to 7.62 Nagant (I could be wrong)
9mm Para to 9mm Mak
10mm to .40 S&W

Help me add to the list!
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Old 12-08-2006, 08:39 PM   #2
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Be very careful. Just as one example, 9mm to 9 Makarov. 9mm brass varies tremendously. I once measured and weighed my range pick ups and found, out of over 1000 rounds, not one was the specified length, the shortest, if I recall correctly was .730", this on a round that supposedly headspaces on the mouth. The real problem was in the weight- the heaviest was 50% more than the lightest. If you realize that internally the walls are tapered and the fact that a true Makarov bullet is .363" in diameter, you can see that pressure might be more than a passing concern.
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Old 12-09-2006, 06:09 AM   #3
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There is an excellent book Handloaders Manual of Cartridge Conversions by Donnely but the only time it is a worthwhile endeavor is if brass is not available at all.
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Old 12-09-2006, 09:54 AM   #4
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.30-06 to 375 whelen, 35 whelen, 338-06, 8mm-06, 280 remington/7mm express, 270 winchester, 25-06.


.30-40 krag to 445 supermag

.308 to 44 automag

there are so many more

but when going from 10m to .40, the case will be thicker so pay attention to pressures.
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Old 12-23-2006, 10:29 AM   #5
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30-06 to 7.65 x 53mm
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Old 12-24-2006, 09:22 AM   #6
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220 Swift to 6.5 japanese and 303 savage
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Old 12-24-2006, 02:44 PM   #7
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Also,
.348 Win. to the 10.4 x 38mm that was used in the Swiss Vetterli.
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Old 12-24-2006, 08:29 PM   #8
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30 Remington to 6.8 SPC

my other fav wildcats:
6x45mm (5.56x45 parent)
8mm06 (.30-06 parent)
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Old 12-24-2006, 11:10 PM   #9
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Quote:
Originally Posted by Charlie Petty
the only time it is a worthwhile endeavor is if brass is not available at all.
Precisely ! It's not as smooth going as it may seem. Hate to see folks find out the hard way. BTW - Fellas - Don't invest to much in these operations Keyword "Unforseen"
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