Product Overview
IMR 4227 is a medium burn speed, magnum pistol propellant. If a pistol says Magnum, IMR 4227 is the choice for true magnum velocities and performance.
In rifles, this powder delivers excellent velocity and accuracy in such cartridges as the 22 Hornet and 221 Fireball.
IMR recommends always consulting www.IMRReloading.com for the most accurate, up-to-date data.
Available in 1-LB and 8-LB containers.
Reviews
18 Reviews
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5 imr 4227
Posted by Richard Ryan on Aug 8th 2022
love it. use it in a number of rounds
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2 Loading data not listing calibers that were used iin several world wars
Posted by Rick Simopnson on Jun 11th 2022
Not listing the .303 British rifle caliber for powders that are commonly used is a real disappointment. .303 British caliber with lead bullets like the Lyman 200 grain that is very popular and it is a wonder why it is not listed but something 6.5 Creedmore is. How many British .303 rifles are in the hands of shooters the world over compared to the 6.5 calibers?
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5 Imr4227 powder
Posted by Bob on Feb 26th 2022
I have used 4227 since 1969 in both rifles and big bore pistols
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4 Power
Posted by Bob on Dec 11th 2021
Shoot good
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5 4227 and 454 Casull
Posted by A. G. Pitts on Nov 21st 2021
Trying to get consistent loading info for 454 Casull can be frustrating, but it is out there. Using 4227 with 300gr cast bullets in a RIFLE. (Loading tables are all for pistols) But I am getting 1300 fps and 3" groups @100yds with hopes to make it tighter next spring. 4227 leaves a lot of unburned powder in a rifle barrel. I hope someone comes out with 454 rifle data soon.
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5 Excellent powder!
Posted by Jeremy R on Nov 18th 2021
The powder arrived very quickly and well packaged. I use this for .357 loads. I load 125gr JHP, which makes for some real hotsteppers. The powder arrived very quickly!
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5 IMR 4227
Posted by Scott H on Nov 18th 2021
Excellent product, fast/clean burn. Works as it should
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5 4227
Posted by Ralph on Nov 7th 2021
Works exactly as I needed to, creating my favorite .350 legend load.
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5 IMR 4227 - Sharps Rifle
Posted by Bob K on Oct 22nd 2021
With the current shortage of reloading supplies, recently I purchased some IMR 4227. This powder has historically been used for magnum pistol loads. However, the manufacturer of the hard cast bullets for my Sharps do recommend this powder for reloading 45-70. I've used this powder with 300 and 405 grain bullets, with excellent results at 100 yards. Unfortunately, that is the only distance available to me where I reside. The load is very pleasant to shoot. normally 50 rounds every times I go to the range. With the cost of commercial ammunition, reloading is a must.
