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View Full Version : 44 Mag 240gr LSWC Over IMR 4227?



BigBoreReloader
04-25-2022, 04:06 PM
I've been reloading for a while now, but looking into a new one for me. I have used both H110 and IMR 4227 for my magnum loads, though I have mostly used 4227 for 44 Magnum for various reasons. As I look up data on the Hodgdon website, it only lists one charge of 22gr of 4227 under the max charge column for 240gr LSWC. Hodgdon also shows 240gr JHP with a charge range of 22-24. Lyman shows a starting charge of 21.5gr / max of 24gr for 240gr cast boolits. So, what I am trying to confirm is what a safe range is. From what I've gathered, it seems 22gr is a good starting load, but is that also the max, or has anyone here comfortably loaded up to 24? I may be being overcautious, but cautious seems the better strategy when reloading!

farmbif
04-25-2022, 04:15 PM
21-24 grains. but I'm pretty darn sure if you load with 20 grains it will still work. when I was working up loads with 45 colt I think I started with 16 grains. with cast bullets weighing 255-270 grains and I found my best loads at 20 and 21 grains.
I always use either a magnum or winchester lg pistol primers with 4227., yeah I know some load manuals use standard primers with 4227

BigBoreReloader
04-25-2022, 04:23 PM
21-24 grains. but I'm pretty darn sure if you load with 20 grains it will still work. when I was working up loads with 45 colt I think I started with 16 grains. with cast bullets weighing 255-270 grains and I found my best loads at 20 and 21 grains.
I always use either a magnum or winchester lg pistol primers with 4227., yeah I know some load manuals use standard primers with 4227

Thanks, I appreciate that... that is what I am figuring. I just pause when I see a Hodgdon list a single charge when they normally show a charge range. I like my fingers and nose just where they are. I typically use Lg pistol primers with 4227, as well.

243winxb
04-26-2022, 08:39 AM
1999 IMR Powder data..https://castboolits.gunloads.com/showthread.php?441845-44-Mag-240gr-LSWC-Over-IMR-4227&p=5394911#post5394911

These are maximum loads. Plain base is loaded lighter, when compared to a Gas Check.

Note difference in bullet diameters. .432" vs .430"

BigBoreReloader
04-26-2022, 09:07 AM
1999 IMR Powder data..https://castboolits.gunloads.com/showthread.php?441845-44-Mag-240gr-LSWC-Over-IMR-4227&p=5394911#post5394911

These are maximum loads. Plain base is loaded lighter, when compared to a Gas Check.

Note difference in bullet diameters. .432" vs .430"

Thank you so much for sending... Much appreciated.

MostlyLeverGuns
04-26-2022, 10:34 AM
4227 is easier to work with than H110. No problems with lighter loads, 16, 18, 20 grains 4227 works fine with 240's if you don't want full power. I found little difference in accuracy with standard vs magnum primers with 4227.

Outpost75
04-28-2022, 05:27 PM
My experience with IMR4227 has been that in revolvers, such as .44 Special, .44-40 and .44 Magnum, that accuracy and ballistic uniformity are fine as long as you don't drop below about 75-80% of the available powder capacity. You will get some sunburned powder particles, but these do no harm and will fall out with the empty brass if you elevate the muzzle to 12:00 when ejecting. In single actions you may want to spin the cylinder with the loading gate open and blow out the mechanism. In DA revolvers hold the extractor back and blow out its recess in the cylinder.

I load 17 grains with #429421 in the .44 Special, 20 grains in the .44 Magnum with the same bullet and 18 grains in the .44-40 with Accurate 43-215C.

Larry Gibson
04-28-2022, 06:09 PM
1999 IMR Powder data..https://castboolits.gunloads.com/showthread.php?441845-44-Mag-240gr-LSWC-Over-IMR-4227&p=5394911#post5394911

These are maximum loads. Plain base is loaded lighter, when compared to a Gas Check.

Note difference in bullet diameters. .432" vs .430"

I would hazard a guess the functional difference between the two loads is because of a probable difference in seating depth. That is based on the different OALs. The PB'd bullet is apparently seated deeper.

243winxb
04-28-2022, 06:17 PM
I would hazard a guess the functional difference between the two loads is because of a probable difference in seating depth. That is based on the different OALs. The PB'd bullet is apparently seated deeper.

Yes, the different bullet changes things.

OFFSHORE
04-28-2022, 08:32 PM
I'm not sure you could put enough IMR4227 powder in a 44 mag case to cause issues. . .at 24.2 grains, which shoots well from my Ruger SBH, it crunches like corn flakes seating 250 gr. Keith's. IMR4227 is a great powder in 44 mag, you can load from mild to wild depending on what your firearm likes best.