IMR4227

Discussions covering the components and techniques of reloading for your long gun.
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Macd
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IMR4227

Post by Macd »

Has anyone had experience with this powder. I read mixed reports. I want to try it in the 8mm at 20 grains which QL shows should give me about 1500 fps.
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Re: IMR4227

Post by Macd »

Okay made up some loads and hope to get them tried this week. I am also going to try in 357 magnum.
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Re: IMR4227

Post by Ranch Dog »

I have had four pounds of H4227 on the shelf for about a decade or better and not found a use for it. Last year, I started using it with my 38 Spl in an effort to expend it. Accuracy is good but velocities are way behind other powders. Max pressure 38 Spl +P loads with H110 delivered 850 FPS from my Rossi 351 revolver using my 125-grain cast bullet. H4227 max loads yielded 635 FPS. This mirrors everything I've tried it with.

H4227 did come up in the QuickLoad query results as a powder with acceptable performance for my Rem 600 chambered in 35 Rem using the Hornady 200-grain spire point when running the cartridge at 358 Win pressure levels. I plan on giving it a try in that application.

I originally bought the H4227 for use with the 375 Win, did work there either. Velocity really behind others for the same pressure.
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Re: IMR4227

Post by Macd »

Funny you should mention 35 Remington. I was looking at some plinking loads using 158 grain jacketed or hard cast pistol bullets. After doing some research I figured around 25-27 grains of IMR 4227 might be the ticket. I still have about 400 204 grain hard cast checked bullets that I could use for a more powerful load. This is in a Rem 760 which is a pretty strong action for 35 Rem. pressures.
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Re: IMR4227

Post by Ranch Dog »

I bought a back issue of Handloader from the '80s that featured heavy 35 Rem loads with the rifle of interest the 760. I will get it scanned and email you a copy. H or IMR 4227 was not mentioned though, that came from QuickLoad.
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Re: IMR4227

Post by Macd »

Ranch Dog wrote:I bought a back issue of Handloader from the '80s that featured heavy 35 Rem loads with the rifle of interest the 760. I will get it scanned and email you a copy. H or IMR 4227 was not mentioned though, that came from QuickLoad.
Thanks RD. I ran a QL check on the 158 pistol bullet (Hornady FP) load and it looked good at ~1900 fps. I have some plated 158's but not sure if they would take that velocity.
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Re: IMR4227

Post by Macd »

While waiting for the 158 grain pistol bullets to be delivered I decided to make up some rounds for my 35 Rem. 760 using my favourate, a 204-5 grain hard cast RNFP. After reading through manuals and web articles I decided to use 20.0 to 24.0 grains of IMR4227 in 1 grain increments with an OAL of 2.40. I took this opportunity to use both CCI-250 and CCI-200 primers to see if it makes any significant difference. I have read that IMR4227 burns more consistently with magnum primers when used in reduced loads. Cases are filled from 60-71% and crimped with a FCD just enough to take out the slight mouth flair. Quickload predicts 1,560-1,812 fps for a 220 grain bullet so I am expecting a bit above that with the 205 grain one. Pressures for the heavier bullet are predicted to be 67% of the CIP MAP for the 35 Remington at a charge of 24.0 grains so I have a good safety margin. I believe I can safely go with a higher charge and my final goal would be to equal the approximately 2,100 fps I get with IMR3031. This has proven to be an excellent hunting round. The Rem. 760 is also a strong action and that provides additional comfort.

As an aside, the powder dropped from my Perfect Powder Measure very consistently. I always drop low, usually by several tenths and trickle up. I was able to dial it down just one grain and only once had to remove a few kernels of powder to get the correct amount. This looks good for the .357 mag loading on the turret press.
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Re: IMR4227

Post by Ranch Dog »

Looking forward to the results. Did you get those Handloader pages I emailed you?
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Re: IMR4227

Post by Macd »

Ranch Dog wrote:Looking forward to the results. Did you get those Handloader pages I emailed you?
No I didn't. Please try again.
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Re: IMR4227

Post by Ranch Dog »

Sent again, might check your spam folder.
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