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H-4227 Primer Question

This is a discussion on H-4227 Primer Question within the Reloading forums, part of the Firearm Forum category; I checked all my manuals including loadbooks and on-line...... Standard SP primer with H-4227, correct? I have a bunch of different data for a 158g ...


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Old August 7th, 2010, 06:59 PM   #1
 
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H-4227 Primer Question

I checked all my manuals including loadbooks and on-line......
Standard SP primer with H-4227, correct?
I have a bunch of different data for a 158g HP-XTP (.357)

Hornady: 14.9g - 17g
Speer: 15g - 17g (their bullets)
Hodgdon: 14.5g - 16g (Hornady bullet)
Loadbook 11.9g - 15.1 (Hornady section)

I plan to load a few at 15.5g @ 1.590" and whiff 'em over a chrono




Last edited by rwnielsen; August 7th, 2010 at 07:26 PM.
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Old August 7th, 2010, 07:10 PM   #2
 
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Standard Small Pistol Primers & IMR 4227, is a good choice. Always had good luck with 4227 powder in most any handgun caliber.
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Old August 7th, 2010, 07:25 PM   #3
 
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Thanks. I had a feeling that standard primers would work. I have both but I've never loaded H-4227 before and thought I'd make sure.
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Old August 7th, 2010, 07:50 PM   #4
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My experience has been different than 41 Magnums. A chronograph is your best friend when you are testing loads. I've found magnum primers produce a much more uniform velocity (max spreads from highest to lowest in a 10 shot string). Also, in cold weather (not likely in So Cal) 4227 tends to be hard to ignite so magnum primers are recommended. Check your Hornady manual again .... Hornady 7th Ed specifies WSPM (Winchester Small Pistol Magnum) primers for your 357 Mag and WLPs for large primer applications. WLPs are Winchester primers intended for both standard and magnum loads. They produce about 15% more "fire" than standard primers and about 10% less than magnum primers and are only available in Large Pistol.
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Old August 8th, 2010, 04:24 AM   #5
 
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You're right. Hornady 4th (pg.565) calls for a Federal 200 (in all loads) which is a magnum primer. I also checked the burn rate chart and see that H-4227 is just below H-110.
Thank you for the info.
Richard

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Old August 12th, 2010, 10:44 AM   #6
 
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I've had problems with unburned powder with IMR 4227 or H 4227 with standard primers and lighter loads. When I get up to around 90% of max, and use magnum primers, the problem doesn't occur. This has occurred in .45 colt, .44 magnum, and .357 Magnum.
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