I've been round and round with hodgdon on the 4227 question. H4227 was made in Australia by ADI and was sold in America by hodgdon as an extreme powder, a temperature stable powder. IMR 4227 was and is made in Canada, not a extreme temp stable powder. Last year i purchased a jug of IMR 4227 and on the label it says made in Australia. I contacted ADI by email and asked them about this powder, and i quote " Previously we have supplied Hodgdon Powder Company with AR2205 which was rebranded as H4227. So the powder you have is actually AR2205. All ADI powders have the BTI technology to ensure that under varying environmental conditions the velocity and pressure changes very little over a large range of temperatures. We test our propellants for consistency over a temperature range of -54C to +80C". On one of ADI websites it states that AR2205 had been changed in color to appear darker. I saved all emails from ADI. My jug is an 8 pounder so i don't know what is stated on the 1 pound containers. At the shop where i purchased this powder they had 4 jugs of IMR 4227, and the one i got was the only one that stated made in Australia, the others said made in Canada on them
H4227 powder?
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I have tried IMR 4227 in .357 magnum and was not impressed. IMO in 44 Magnum it is very good. Seems to do better with heavy bullets in larger cases. I have developed a load for 44 magnum rifle load with 240gr jacketed bullets and IMR 4227 that is so accurate I've quit development on the load. It's my go to load in that rifle. Awhile back I was working on loads for a 480 Ruger using 350gr bullets and had a hard time finding data for that powder with my combination. So I sent an e-mail to Hodgdon asking them how close H 4227 and IMR 4227 were, as I was finding load data for my combination using H 4227 and not IMR 4227. I received a reply from Mike Daly with Hodgdon saying " Yes, they are the same powder and the data can be interchangeably." That was in November of 2016.
mcb
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I bough a pound of the IMR 4227 to try in 44 Mag and ended up liking 800-x better. I was working up a sub-sonic 300BO load and gave it a try in that and it works very nicely and is noticeably quieter in my suppressor that the same velocity using H110.
Charlie98
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mcb
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In 44 Mag I was going for a relatively full power load. I was going for a 240gr JHP going ~1350 fps. The 800-x version simply did that with less muzzle blast and more accurately than the 4227 did in my M29 and M92. Maybe had I pushed the 4227 hotter in 44 Mag it might have worked better but 800-x did what I wanted nicely.
It was several months later as I was working up a sub-sonic 300 BO load for my new suppressor and I was researching powders to try I found some data using 4227 in heavy sub-sonic 300 BO. I remembered I had a partial pound in the locker and I tried it under a 220gr Barry's plated and it worked really well and quiet. So it is now my powder of choice for sub-sonic plinking loads in 300 BO.
The interesting thing is the 4227 worked great under the plated-lead Barry's bullet but when I started working up a 220gr Maker Bullet for hunting (a monolithic copper bullet) it did not work well at all with 4227. Once I got the velocity down to ~1050 fps the Maker Bullet would no longer cycle the action reliably. Sort of interesting how well it works under a 220gr plate-lead and how poorly it worked under a 220gr copper bullet. Had to switch to Accurate 1680 to get the Maker Bullet working right.
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