.300 Win Mag Powder

Midas · 05-09-2008, 05:40 PM

Picked up a set of dies for my .300 Win mag today, but I'm not sure what powder to go with, for all of you handloaders, what powder has worked best in your .300 WM? any input will be much appreciated.

lefty o · 05-09-2008, 06:31 PM

a good starting place for a mag is hodgdon 4831.

Ron AKA · 05-09-2008, 06:50 PM

Yep, H4831 is probably the most tried and true for the big mags. It is all I have ever used. Hodgdon has a new powder out called Hybrid 100V. It seems to get another 100-150 fps with less powder and less pressure when compared to the H4831. May be worth a try if you can find someone with it in stock.

I've heard good things about the Alliant Reloader powder (Reloader 22, 25), but have not personally used it.

Reloading Data

Ron

runfiverun · 05-09-2008, 08:04 PM

that hybrid is supposed to be real close to the old h-450 which is close to rl-19.
rl-22 would probably be a better second choice for the 300, after 4831.

toolman · 05-09-2008, 08:14 PM

I've not used it in a mag., but I'd think IMR 7828 would work well.

burd1959 · 05-09-2008, 08:48 PM

4831 most acurate i came up with in my 300win mag

samuel · 05-09-2008, 08:56 PM

I agree with LeftyO.Also,the longer the barrel and the larger the capacity in casing,the slower the burnrate. sam.

Midas · 05-09-2008, 09:08 PM

Thank you very much gentlemen, I will be picking up a can of H4831, and I will see how it shoots in my gun. I appreciate the input.

AKHunter · 05-09-2008, 09:27 PM

I dont own a .300wm but I would have suggested H4831 as it works well in my .338wm but I found RL22 REALLY shoots well . So you may want to give that a try.

irish murphy · 05-09-2008, 09:38 PM

I do own a 300wm and my favourite powder is the ADI ar2209,which is what hodgdon H4350/H414 are really.I am using a magnum primer to ignite the things too.180gn remington corelokts PSP.Bloody accurate.

Ron AKA · 05-09-2008, 09:42 PM

The best powders for a given cartridge typically fall within a fairly narrow burn rate range. For sure H4831 is close to ideal for the big mags. So, you will find other powders that may work which are close to the H4831 burn rate. The other issue of course not quantified by burn rate is quality and consistency, and for those folk in colder climates temperature sensitivity.

See this burn rate chart to see what powders could work for you.

Powder Burn Rates

Ron

sc928porsche · 05-09-2008, 10:16 PM

Dont know why, but my old 77 likes the imr 4350 best. Each rifle is an individual, so try a few different ones like the afore mentioned 4831 and possibly H870 if it is still available.

SwedeSteve · 05-13-2008, 12:43 PM

Thanks for all the great info guys! Very useful.

samuel · 05-13-2008, 02:21 PM

Remember,if you are going to hunt in colder climates,mag primers are required. sam.

sc928porsche · 05-17-2008, 10:42 AM

I ALWAYS use mag primers on slow burning powders because they are a little bit harder to ignite.

rfc357 · 05-17-2008, 12:13 PM

Slow burning powders are not harder to ignite, but large charges are.

My experience matches AKHunter's. Either IMR 4831, H4831, and or RL-22 work fine.

I don't bother with bullets under 180 grains in the 300 WM.

Mooseman684 · 05-17-2008, 01:15 PM

I use 69.0 grains of IMR-4350 or 72.0 gr. of IMR 4831 for 180 gr. bullets...
I have also loaded 59.0 gr. of IMR 4895 with 180 gr. Bullets and got some nice accuracy !
Rich

samuel · 05-17-2008, 01:51 PM

Quote:

Originally Posted by irish murphy

I do own a 300wm and my favourite powder is the ADI ar2209,which is what hodgdon H4350/H414 are really.I am using a magnum primer to ignite the things too.180gn remington corelokts PSP.Bloody accurate.

Our experience in the field means nothing and we are dead wrong. sam.

Quote:

Originally Posted by rfc357

Slow burning powders are not harder to ignite, but large charges are.

My experience matches AKHunter's. Either IMR 4831, H4831, and or RL-22 work fine.

I don't bother with bullets under 180 grains in the 300 WM.

How are you going to use slower burn rate without using more powder?All I know ---ah,to hell with it let the experts have it--I can find something that fits my lower brain capacity to do. sam.

Palladin8 · 05-17-2008, 04:38 PM

I've had really good luck with the Alliant powders both in RL-19 and RL-22. I typically shoot the 200gr sierra match king bullet with it and the RL-22 worked great.

Sierra's manual recommends the AA-3100 for the 180 and 190 for accuracy. My gun grouped best with the RL-22.

Good luck

05-09-2008, 05:40 PM	#1
Midas Troll B' Gone Join Date: Jan 2006 Location: Springdale, Arkansas Posts: 3,899 Images: 2 Blog Entries: 6	.300 Win Mag Powder Picked up a set of dies for my .300 Win mag today, but I'm not sure what powder to go with, for all of you handloaders, what powder has worked best in your .300 WM? any input will be much appreciated. __________________ "Recoil lasts for a second, gravity lasts forever"

05-09-2008, 08:14 PM	#5
toolman Mr. Fixit Join Date: Apr 2002 Location: abilene,tx Posts: 5,852 Blog Entries: 24	I've not used it in a mag., but I'd think IMR 7828 would work well. __________________ cosmoline is an aphrodisiac!

05-09-2008, 09:08 PM	#8
Midas Troll B' Gone Join Date: Jan 2006 Location: Springdale, Arkansas Posts: 3,899 Images: 2 Blog Entries: 6	Thank you very much gentlemen, I will be picking up a can of H4831, and I will see how it shoots in my gun. I appreciate the input. __________________ "Recoil lasts for a second, gravity lasts forever"

05-13-2008, 12:43 PM	#13
SwedeSteve Thor's Hammer Join Date: Feb 2007 Location: Alaska Posts: 12,545 Images: 1	Thanks for all the great info guys! Very useful. __________________ Thank God we don't get as much Government as we pay for! -Will Rogers

05-17-2008, 12:13 PM	#16
rfc357 Senior Member Join Date: Jun 2006 Posts: 741	Slow burning powders are not harder to ignite, but large charges are. My experience matches AKHunter's. Either IMR 4831, H4831, and or RL-22 work fine. I don't bother with bullets under 180 grains in the 300 WM. __________________ Certified rifle and pistol instructor

05-09-2008, 06:31 PM	#2
lefty o Senior Member Join Date: Mar 2002 Location: mn Posts: 5,103	a good starting place for a mag is hodgdon 4831.

05-09-2008, 06:50 PM	#3
Ron AKA Banned Join Date: Dec 2007 Location: Alberta, Canada Posts: 704	Yep, H4831 is probably the most tried and true for the big mags. It is all I have ever used. Hodgdon has a new powder out called Hybrid 100V. It seems to get another 100-150 fps with less powder and less pressure when compared to the H4831. May be worth a try if you can find someone with it in stock. I've heard good things about the Alliant Reloader powder (Reloader 22, 25), but have not personally used it. Reloading Data Ron

05-09-2008, 08:04 PM	#4
runfiverun Senior Member Join Date: Jan 2008 Location: soda springs idaho Posts: 338	that hybrid is supposed to be real close to the old h-450 which is close to rl-19. rl-22 would probably be a better second choice for the 300, after 4831.

05-09-2008, 08:48 PM	#6
burd1959 Senior Member Join Date: Aug 2005 Location: burton michigan Posts: 608	4831 most acurate i came up with in my 300win mag

05-09-2008, 08:56 PM	#7
samuel Senior Member Join Date: Dec 2006 Posts: 5,185	I agree with LeftyO.Also,the longer the barrel and the larger the capacity in casing,the slower the burnrate. sam.

05-09-2008, 09:27 PM	#9
AKHunter Senior Member Join Date: Feb 2008 Location: Alaska Posts: 899	I dont own a .300wm but I would have suggested H4831 as it works well in my .338wm but I found RL22 REALLY shoots well . So you may want to give that a try.

05-09-2008, 09:38 PM	#10
irish murphy Banned Join Date: Oct 2007 Location: Canberra,Australia Posts: 1,028 Blog Entries: 5	I do own a 300wm and my favourite powder is the ADI ar2209,which is what hodgdon H4350/H414 are really.I am using a magnum primer to ignite the things too.180gn remington corelokts PSP.Bloody accurate.

05-09-2008, 09:42 PM	#11
Ron AKA Banned Join Date: Dec 2007 Location: Alberta, Canada Posts: 704	The best powders for a given cartridge typically fall within a fairly narrow burn rate range. For sure H4831 is close to ideal for the big mags. So, you will find other powders that may work which are close to the H4831 burn rate. The other issue of course not quantified by burn rate is quality and consistency, and for those folk in colder climates temperature sensitivity. See this burn rate chart to see what powders could work for you. Powder Burn Rates Ron

05-09-2008, 10:16 PM	#12
sc928porsche Senior Member Join Date: Apr 2008 Location: living in Alabama now Posts: 298	Dont know why, but my old 77 likes the imr 4350 best. Each rifle is an individual, so try a few different ones like the afore mentioned 4831 and possibly H870 if it is still available.

05-13-2008, 02:21 PM	#14
samuel Senior Member Join Date: Dec 2006 Posts: 5,185	Remember,if you are going to hunt in colder climates,mag primers are required. sam.

05-17-2008, 10:42 AM	#15
sc928porsche Senior Member Join Date: Apr 2008 Location: living in Alabama now Posts: 298	I ALWAYS use mag primers on slow burning powders because they are a little bit harder to ignite.

05-17-2008, 01:15 PM	#17
Mooseman684 Super Moderator Join Date: Dec 2005 Location: Alaska Wilderness Posts: 10,524 Images: 2	I use 69.0 grains of IMR-4350 or 72.0 gr. of IMR 4831 for 180 gr. bullets... I have also loaded 59.0 gr. of IMR 4895 with 180 gr. Bullets and got some nice accuracy ! Rich __________________ You know you might be facing your doom,when all you get is a click when you're expecting a BOOM!

05-17-2008, 04:38 PM	#19
Palladin8 Senior Member Join Date: Nov 2007 Location: Las Vegas, NV Posts: 576	I've had really good luck with the Alliant powders both in RL-19 and RL-22. I typically shoot the 200gr sierra match king bullet with it and the RL-22 worked great. Sierra's manual recommends the AA-3100 for the 180 and 190 for accuracy. My gun grouped best with the RL-22. Good luck