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Old March 25, 2015, 02:52 PM   #1
JFrameTwitch
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Imr 4227

I cannot find much for powder in my area. I want to load full power 357 magnum. I found a pound of this. I have 158g LSWC at home. Can I make full house rounds with this powder? I only saw data for a 140 grain bullet on the website.
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Old March 25, 2015, 02:59 PM   #2
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If you can find load data, then you can do it. If there isn't load data, then you probably shouldn't try it.
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Old March 25, 2015, 03:00 PM   #3
Ccctennis
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I started two threads on this exact situation over the past two weeks!
Here is the readers digest version. it is very similar to H-110 my favorite magnum powder. You need to be on the upper end of the power level to avoid powder/ash fouling up the gun. it has similar recoil to H-110. I am using 158 grain SWC lasercast lead.

I am currently up to 15.3 grains and the best accuracy is at the top end.

http://www.thehighroad.org/showthread.php?t=776520
http://www.thehighroad.org/showthread.php?t=775975
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Old March 25, 2015, 03:31 PM   #4
JFrameTwitch
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Thanks, that is helpful. Based on your experience, do your heavier loads feel like full house 357 magnum loads? Also, there was not a lot on magnum vs small pistol primers. I have a ton of small pistol but no magnum small pistol. Also hard to find. Can I get away with the small pistol primer or do I need a magnum.

Another thing is that I have 158gr LRNFP coming out of my ears. Any experience using this powder with that particular bullet? I guess it would be the same or similar to a LSWC. They are not cast.
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Old March 25, 2015, 03:31 PM   #5
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Hodgdon H4227
.357" 1.580"

14.5 1,402 34,600 CUP
16.0 1,520 42,600 CUP

Straight from the Hodgdon/IMR page

You may have problems with "full house" because you are using lead
bullets, not jacketed.
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Old March 25, 2015, 06:58 PM   #6
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I too have a thread out there on my experimentation with 4227 and lead 158 grain bullets. Bottom line for me, all things considered, is around 16 grains with a good crimp. Stout load, very little 'ash' left, and really good accuracy.

Also, in my Smith 686, I've never had an issue with leading (no gas check 18bhn) into the 1400 fps range...
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Old March 25, 2015, 09:29 PM   #7
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I agree with the rest. I'm up to 15.5 right now. It is full house loads for me. I also am going to work towards 15.8-16.0 over the weekend in my gp100. I have gotten really tight groups as I got towards the book max. I'm still a bigger fan of H-110 but I'm not paying current prices. I can grab 4227 for 19.99 right now at my local store
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Old March 25, 2015, 10:04 PM   #8
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FYI, you can use H4227 data for loading IMR 4227. If you plug in 357 Magnum RIFLE in Hodgdon's data center they have data for both and the numbers are exactly the same, just like they do with 296/H110, 231/HP38 and 760/H414.
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Old March 26, 2015, 09:27 AM   #9
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Thanks all, exactly what I was looking for. I will go ahead and grab a pound and see how it goes.

Are any of you using regular small pistol primers or do I need to find some magnum?
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Old March 26, 2015, 08:20 PM   #10
Ccctennis
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Imr 4227 needs magnum primers to help with ignition.
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Old March 26, 2015, 08:30 PM   #11
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Have been using small rifle primers, which work well.

Don
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Old March 27, 2015, 03:07 AM   #12
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I’ll second the small rifle primers with 4227. Been using that combo for many years.
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Old March 27, 2015, 09:06 AM   #13
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Small pistol primers work fine for me.
More important to use enough powder to keep pressure up and a good firm crimp.

Great accuracy and enough power.
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Old March 28, 2015, 12:06 PM   #14
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I just reloaded the IMR4227 15.5 gr and 158 gr FN Berry bullets for my 357. I will be testing them next week when I go to the range.
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Old March 28, 2015, 03:21 PM   #15
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Hey parman please do report back when you shoot them. What primer are you using?
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Old March 29, 2015, 11:25 AM   #16
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I'm using CCI #500 small pistol primers. PLan on going to range tomorrow. I wil let you know how they perform.
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Old Yesterday, 07:13 PM   #17
JFrameTwitch
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How did they shoot?
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Old Yesterday, 08:33 PM   #18
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Quote:
Originally Posted by Ccctennis View Post
Imr 4227 needs magnum primers to help with ignition.
Back in the late '60s when my dad & I started reloading for his .357mag, we used both IMR4227 and 700x.

We only used regular small pistol primers and never experienced any ignition issues.
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