IMR4227 and magnums ?

[flatgate]

Well,it's been my experience in my guns that IMR 4227 likes to be in a "tight boiler", i.e. the powder column should be darn close to the base of the seated bullet. Some published data even lists compressed charges.

Your milage may vary,

flatgate

 

[pvtschultz]

I'll agree with flatgate. In my 45 Colt, the most accurate/best shooting load was near max where the powder came right near the base of the bullet.

From Hodgdon's 26th, IMR4227:

44 mag/300 gr bullet = 18.0-20.0 gr/1056-1238 fps/31,600-37,700 CUP

41 mag/210 gr bullet = 19.0-21.0 gr/1169-1319 fps

357 mag/158 gr bullet = 13.5-14.5 gr/1239-1359 fps/30,100-35,000 CUP

Hope that helps out. Nice score BTW.

Lee's Second Edition:

41 mag => 20.5c grains, 1395 fps

The others not being listed.

HTH

[This message has been edited by pvtschultz (edited 10-27-2006).]

 

[COFFEE POT]

I've used a lot of IMR4227 in my .44 mags. It shoots great especially with compressed charges, heavy crimp.

------------------
Coffee Pot

"He who knows others is wise, He who knows himself is enlightened"

 

[pvtschultz]

Coffee Pot: Do you use magnum primers or regulars? I have heard both for this powder.

 

[Don Lovel]

I like 20.5gr of IMR4227 and a 210gr JSP in the 41mag, makes 1200fps out of a 4 5/8" barrel and recoil and muzzle blast is not too bad.
I use 22.5gr of IMR 4227 and a 300gr Sierra JSP or Hornady XTP in the 45 Colt, great accuracy, tremendous knockdown power on big whitetails.

 

[COFFEE POT]

I've been using the Winchester primers that are marked for either Standard or Magnum loads. They seem to be OK. IMR4227 still leaves a very small amout of unburned powder. That's quite common with it though. Never tried straight 'Magnum' primers in it. My powder is quite old and I use the old specs for loading it. They call for a standard primer.

------------------
Coffee Pot

"He who knows others is wise, He who knows himself is enlightened"

 

[Boxhead]

What Flatgate said. I hope you are a youngster as that is a lot of "stuff" to put down the chute. A bunch of it would likely land on the luggage rack of my hearse.

 

[protoolman]

I have found a heavy charge of 4227 behind a hand cast 320 gr. bullet is very accurate out of my 4 5/8 Blackhawk, I use the WLP primer behind it.

 

[Biggfoot44]

Wow , back after 6yrs !

But anyway , with magnums my default starting point is what ever is about 95% load density with particular bullet. It has always given at least decent accuracy. Work up to compressed to either fine tune accuracy , or if more vel is desired. While I typically use the WLP, standard primers for magnum-ish loads.

While not initially listed by OP , in .45LC in the neighborhood of 20.0 with a 250-255 cast will give aprox 1000fps with aprox 20K pressure.

Ironically , if loading outside usual parmeters in a low pressure application (ie .38spl +P , etc) a magnum primer will help with consistancy.

FWIW , since Hogdons took over IMR , the 4227 has been identical for either IMR or H on the label. Supposedly they will currently only market it under IMR label.

 

[Rclark]

While not initially listed by OP , in .45LC in the neighborhood of 20.0 with a 250-255 cast will give aprox 1000fps with aprox 20K pressure.

My favorite .45 Colt load. My chrono shows 1050fps out of 5 1/2" barrel. Taffin states that it is safe in all modern .45 Colt revolvers. I use it in both my .45 Colt flattops (medium frame) and .45 Colt BHs (large frame).

I have data for 240g SWC and .44mag and .44Spec, and .357 158g SWC... but not any jacketed bullet data of any weight.

I always use a CCI Magnum primer with IMR-4227 for consistency.

Wow , back after 6yrs !

Didn't notice the date! Old thread alright! But still relevant!