IMR 4227

[USSR]

I found 16.0gr of 4227 behind a 158gr XTP to be the most accurate load in my 686. Ignore the unburned granules of powder.

Don

 

[silentflyer]

I use it for ,22hornet, .41 mag with 220 grain bullets and .44 mag 240 grain bullets, magnum primers, works great in the 8 3/8" barrels.

 

[ameridaddy]

In early 80's I was shooting metal silhouettes out to 200 yards where both accuracy and power were necessary. I tried H110, 296, 2400 and 4227 powders. My 44 Mag accuracy load in my 8-3/8" Mod 29 with a 240 gr jacketed bullet worked out to be the max load of DuPont 4227, which if memory serves, (don't believe me - CHECK loading tables) was 24 grains. This was a max load, with slightly flattened primers, but I was astounded when my 25 yard groups suddenly, like flipping a switch, dropped from ~2.5" - 3" to 1.25" when I added that last 1/2 grain of 4227. At that max load, I had no unburned powder, but it really hammered my gun. My max loads in a Mod 27 were no problem, but that big bullet and a max powder charge in a 29 required frequent visits to the smith for timing and crane work.
Bottom line is try it; your gun may really like it.

 

[ageingstudent]

With an upper end charge it works good in a carbine for sure. I have a workup for my GP100 that works okay, but It's a backup for when other powders I like better aren't available.

 

[ggibson511960]

Coincidence?

IMR 4227 (back in the duPont days) was the first propellant I ever used for loading the .44 Mag, in 1964-65. The only reloading tool I had back then was the "Lee Loader." You pounded the case into the die with a hammer and punched it out with a hammer and rod. You also needed the hammer for depriming and priming. You measured and loaded powder using a plastic dipper. It was slow and noisy but it worked. I used to sit on the floor and reload in front of the TV. I think I still have that Lee Loader somewhere, but haven't seen it in many years.

My first reloading kit, circa 1973, was a Lee Loader for .357 Mag. I was young and dumb, etc., and thought all that un-burned 4227 debris in the barrel was normal, just as was having primers pop in the living room when hammering on cases. There are way better loading tools and powders. Both the Lee Loader and 4227 are long gone from my inventory. I'm sure 4227 works great for some recipes, but not the clean burning ones I value.

 

[dave1918a2]

I have miniscule un burned granules in the 44 and 41, but none in the Jet.

 

[BC38]

I have miniscule un burned granules in the 44 and 41, but none in the Jet.

Kinda sounds like it really likes being burned in bottle-necked cases like the Jet...

Are you loading at or near max? Heavy roll crimp?

 

[ageingstudent]

Kinda sounds like it really likes being burned in bottle-necked cases like the Jet...

Are you loading at or near max? Heavy roll crimp?

I put a fairly tight crimp on mine it seems to help. And yes it burns better in the upper half of the range. Recoil is noticeably different. Not real sharp more of a wallop.

I get nary a speck of unburned powder in my 1907 Winchester. It likes longer barrels for sure.