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Has anyone any experience with H4227 as compared to H110 and A2400? I was told by Hodgdon that 4227 was temp insensitive. Does it give as good a result (velocity, pressure, etc) as the other 2 powders?  I have a 44 mag
 

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H4227 is not temp sensitive. However its very bulky and compressed loads are common with this powder. I use lots of 4227 in 45colt,454, and 475. Its gentle with cast bullets!! pressure wise it will give less velocity than H110 with all else being equal. It does not mind reductions at all and behaves very well even at -20%. IT burns cleaner than 2400 however there will be some residue left in the barrel especially with lighter bullets, But most mag powders will as they need resistance to burn properly. firm crimps,high neck tension, moderate to heavy bullet for the caliber. If you dont want full house barn burners then H4227 is a good choice. If not go with only H110/W296 for full snort loadings only. My only complaint with H4227 is the price!! it usually runs $2 more per can than my most common powders, H110,HS6,AA9. GO ahead and try it as I am sure you will Like the results you will get with it. Hope this helps You.
Jim
 

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The one time I used 4227 was in .44 Magnum launching 250-grain hardcast bullets. I was never able to get consistent ignition. Mucho unburned powder from 4" and 5.5" handguns.
 

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I have used IMR4227 and H4227 in a lot of different calibers with fine results. Please note that they are not interchangeable as to loading data.
These powders leave a lot of residue in the barrel because only about half of it burns in the short handgun size barrels. This residue will not hurt the barrel in any way as far as I can tell. When I got my first 44Mag in 1973, a 4in M29 S&W, I shot 200 to 300 rounds  a weekend through it using a 250 cast bullet and 23.0 grains of IMR4227. This load gives about 1150 in a 4in barrel. This went on for a year. The bore looked perfect with no erosion. I traded the gun in for an 8in M29 and the dealer said it looked like a new gun.
The only problem with these powders is that some double actions can build up fouling under the extractor star which can make the gun hard to open. This is no problem with the single actions.
With cast bullets there is less leading also because the powder burns cooler. I have seen barrels used with a lot of heavy Unique powder loads that were washed out at the forcing cone.
 

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I have used IMR4227 and H4227 in a lot of different calibers with fine results. Please note that they are not interchangeable as to loading data.
These powders leave a lot of residue in the barrel because only about half of it burns in the short handgun size barrels. This residue will not hurt the barrel in any way as far as I can tell. When I got my first 44Mag in 1973, a 4in M29 S&W, I shot 200 to 300 rounds  a weekend through it using a 250 cast bullet and 23.0 grains of IMR4227. This load gives about 1150 in a 4in barrel. This went on for a year. The bore looked perfect with no erosion. I traded the gun in for an 8in M29 and the dealer said it looked like a new gun.
The only problem with these powders is that some double actions can build up fouling under the extractor star which can make the gun hard to open. This is no problem with the single actions.
With cast bullets there is less leading also because the powder burns cooler. I currently use  16.5 grains of H4227 with a 250 grain cast in the 44SPl  with great results. l
 
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