If at all possible, we advise that you simply ascertain the COAL of your rifle, and load your bullets at 1mm wanting the lands.

I might simply Look into a number of your loading manuals and find out how they list 4227 on your calibers.

I will consider your phrase on all that Ed. This is an aged-time Springfield load.  I have not chronographed it but I am guessing it really is at or under 1500 ft/sec.

If somebody dumbs down the load then why in the world invest in some thing Along with the identify "magnum" hooked up to it to start with? If a person is looking for accuracy, purchase a 38 four" and shoot wadcutters.

I loaded some 158 grain swc. with imr 4227. I kinda preferred the stuff. I program on employing considerably more for my magnum loads. my bullets were plain dependent And that i experienced no major at max load.

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The H4227 was an "Extraordinary" powder, indicating it experienced stabilizing chemical substances provided to make it fewer temperature delicate, Whilst the IMR4227 was NOT an extreme powder.

OP I should question why you will need that velocity? I'd personally Assume precision will be a far better intention than an additional 100fps. Such as my 223 loads are a bit slow but @a hundred yards I've four pictures touching. My buddies would give me a hard time throughout chrono but shut up once they noticed my targets.

Incredibly adaptable powder- total energy loads in smaller scenarios and diminished Forged loads in big ones. Each of the previous Lyman manuals furthermore The present a single lists a plethora of loads for 4227.

Mark the circumstances having a file or hacksaw cut through the head and hold them independent. I have also tried using with rather very good outcomes, using a very small black powder booster of 3F blackpowder, not more than 2 grains, evenly blended Along with the smokeless powder demand. Indeed, You must clean Later on.

JLS1980, you happen to be appropriate in lots of what imr 4227 load data you say. I have found every thing desired, with the massive exception of primers, for 357 and 38 Specific on-line. You need to do must be diligent and maintain checking web-sites for availability.

To start, the DuPont Corporation permitted with imr 4227 powder the generation with the IMR brand beneath its umbrella . In actual fact, E. I. duPont arrived in America in imr 4227 load data 1800 decided to make an improved gunpowder and, by 1802, was manufacturing gunpowder in a brand new plant alongside the Brandywine River in Wilmington, Delaware (this plant morphed into exactly what is these days the GOEX manufacturer of black powder).

We continue to prioritize our shipments to our traditional sales channels To optimize powder availability at vendors.