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300 win mag powder??
#6148921
01/22/16 05:50 PM
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Joined: Dec 2012
Posts: 22
sauce06
OP
Light Foot
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OP
Light Foot
Joined: Dec 2012
Posts: 22 |
Hey all, i recently was given a winchester model 70 (post 64) in winchester 300 mag. I have been loading for a few rifles for a while and the slowest burning powder i have on hand is imr 4350. I tried working up an accurate load with this powder and 180 gr pills, but no dice. Best groups from 65 to 67.6 grains was 1.5 inches. Does anyone have any recommendations for a new powder to try? Really would like to stick to 180 grainers. I should note that with the 4350 it showed early pressure signs (around 67 grains). Im guessing the 4350 is just to fast burning. Anyway, any reccomendations would be helpful. Thanks!
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Re: 300 win mag powder??
[Re: sauce06]
#6148984
01/22/16 06:14 PM
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Joined: Dec 2008
Posts: 41,160
J.G.
THF Celebrity
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THF Celebrity
Joined: Dec 2008
Posts: 41,160 |
800 Yard Steel Range Precision Rifle Instruction Memberships and Classes Available
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Re: 300 win mag powder??
[Re: sauce06]
#6149013
01/22/16 06:25 PM
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Joined: Jul 2015
Posts: 309
Elpatoloco
Bird Dog
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Bird Dog
Joined: Jul 2015
Posts: 309 |
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Re: 300 win mag powder??
[Re: sauce06]
#6149066
01/22/16 06:55 PM
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Joined: Oct 2006
Posts: 171
km_stevens
Woodsman
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Woodsman
Joined: Oct 2006
Posts: 171 |
I've had good luck with IMR4831 and H4831SC. Most recent load with IMR4831; 69.5gr & 180 accubond have been good but havent tested past 300 yrds.
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Re: 300 win mag powder??
[Re: sauce06]
#6149133
01/22/16 07:23 PM
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Joined: Dec 2012
Posts: 22
sauce06
OP
Light Foot
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OP
Light Foot
Joined: Dec 2012
Posts: 22 |
Thanks guys, i believe i saw those powders in stock last time i checked out the gun shop. I heard h-1000 was used in the military m248 load. But that was for a 220 gr pill. Anyway, ill pick one up when i get out of work. Any proven load recommendations for the 180 grain loads with the h-1000?? I like the idea of the 4831 since i can load it in my 25-06 too...........decisions decisions.
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Re: 300 win mag powder??
[Re: sauce06]
#6149154
01/22/16 07:37 PM
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Joined: Mar 2012
Posts: 3,809
Cleric
Extreme Tracker
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Extreme Tracker
Joined: Mar 2012
Posts: 3,809 |
7797
Lighter bullets may need a bit faster than retumbo
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Re: 300 win mag powder??
[Re: sauce06]
#6149486
01/22/16 11:09 PM
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Joined: Nov 2011
Posts: 3,633
DStroud
Extreme Tracker
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Extreme Tracker
Joined: Nov 2011
Posts: 3,633 |
"Anyone taking up handloading necessarily plays with unknown factors and takes chances. But so does anyone who drives a car,goes to a cocktail party,eats in a restaurant,or gets married."
Jack O'Connor 1963
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Re: 300 win mag powder??
[Re: sauce06]
#6149533
01/22/16 11:44 PM
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Joined: Feb 2009
Posts: 2,856
30378
Veteran Tracker
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NRA Benefactor Life Member - Free men should not be subjected to permits, paperwork and taxation in order to carry a firearm.
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Re: 300 win mag powder??
[Re: sauce06]
#6150390
01/23/16 04:45 PM
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Joined: Sep 2009
Posts: 18,934
ChadTRG42
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THF Celebrity
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Posts: 18,934 |
H4831, IMR 4831, H1000, IMR 7977, 4000MR, all good choices for the 180 grain bullet weights.
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Re: 300 win mag powder??
[Re: sauce06]
#6152014
01/24/16 07:24 PM
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Joined: Aug 2010
Posts: 607
Gatorpoint
Tracker
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Tracker
Joined: Aug 2010
Posts: 607 |
I have a first gen Rem 700 sendero and mine shoots 180 accubonds over 73.5 gr RL-22 pretty well. Hope it helps.
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Re: 300 win mag powder??
[Re: sauce06]
#6152691
01/25/16 01:13 AM
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Joined: Dec 2012
Posts: 22
sauce06
OP
Light Foot
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OP
Light Foot
Joined: Dec 2012
Posts: 22 |
Well, ill be off tommorow so im going to hit the nearest gun shop, pick up one of the aforementioned powders and start testing some loads. Will post any positive results soon and thanks all!!
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Re: 300 win mag powder??
[Re: sauce06]
#6152704
01/25/16 01:21 AM
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Joined: Nov 2007
Posts: 9,516
RiverRider
THF Trophy Hunter
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If I was going to shop for a new powder to shoot 180s in a .300 Win Mag, I think I'd be looking for Re26.
"Arguing with you always makes me thirsty." -Augustus McRae
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Re: 300 win mag powder??
[Re: sauce06]
#6153047
01/25/16 04:10 AM
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Joined: Sep 2004
Posts: 6,407
WileyCoyote
THF Trophy Hunter
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THF Trophy Hunter
Joined: Sep 2004
Posts: 6,407 |
My now departed early '90's M70 Classic SS 300 Winnie was not too picky, but under it's preferred diet of 180gr SBT's, or 180 gr NBT's/NAB's it was a dependable MOA or better in my usual 4 shot groups when I was having a good blood pressure day, stoked with the Sierra Book Accuracy Load of 71.6 gr's of IMR 4831, in either RP or WW brass and lit with RP Magnum primers. I am quite certain that a better trigger & glass would have helped make it mo bettah. Ron
It is TIME for Term Limits, cause Politicians are like childrens diapers and for the same reasons...Robin Williams "These are the times that try men's soul's"...Thomas Paine
"Those who fail to learn from History are doomed to repeat it" ....Santayana
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Re: 300 win mag powder??
[Re: sauce06]
#6153397
01/25/16 02:46 PM
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Joined: May 2007
Posts: 1,221
papa45
Pro Tracker
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Pro Tracker
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Posts: 1,221 |
I load mine with 69-70 gr IMR 4350, depending on the bullet, with no pressure signs.
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Re: 300 win mag powder??
[Re: sauce06]
#6153958
01/25/16 07:54 PM
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Joined: Apr 2012
Posts: 390
okierifleman
Bird Dog
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Bird Dog
Joined: Apr 2012
Posts: 390 |
I had very good luck with RL17 and 178 A Max. I just did my first round on the 208's with Retumbo and am pleased so far
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Re: 300 win mag powder??
[Re: okierifleman]
#6749947
04/30/17 01:10 AM
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Joined: Dec 2012
Posts: 22
sauce06
OP
Light Foot
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OP
Light Foot
Joined: Dec 2012
Posts: 22 |
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Re: 300 win mag powder??
[Re: papa45]
#6750110
04/30/17 02:46 AM
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Joined: Mar 2016
Posts: 365
Huckleberry75
Bird Dog
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Bird Dog
Joined: Mar 2016
Posts: 365 |
I load mine with 69-70 gr IMR 4350, depending on the bullet, with no pressure signs. I have run 71.0gns of IMR 4350 behind the Sierra 180gn Gamekings in multiple 300's and lots of full freezers can attest to its abilities. It's at max or a tad bit over, so work up to that if you try it out.
Are you going to pull those pistols, or whistle Dixie?
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Re: 300 win mag powder??
[Re: km_stevens]
#6750279
04/30/17 01:37 PM
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Joined: Sep 2004
Posts: 6,407
WileyCoyote
THF Trophy Hunter
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THF Trophy Hunter
Joined: Sep 2004
Posts: 6,407 |
+1 on KM Stevens loads over more than a couple 300 Winnies in a variety of 180gr'ers. Last one, an early '90's M70 Classic SS I wish I'd kept, p'fred the IMR a scootch better @ a scootch heavier load in RP brass & RP mag primers. When you get down to the minutia of under a MOA's it comes down to the Lot #'s of the components too
Look at the Sierra book loads for a starting place. FWIW all of my 300's liked FB bullets mo bettah too. Ron
It is TIME for Term Limits, cause Politicians are like childrens diapers and for the same reasons...Robin Williams "These are the times that try men's soul's"...Thomas Paine
"Those who fail to learn from History are doomed to repeat it" ....Santayana
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Re: 300 win mag powder??
[Re: sauce06]
#6750719
05/01/17 01:22 AM
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Joined: Feb 2009
Posts: 5,872
GLC
THF Trophy Hunter
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THF Trophy Hunter
Joined: Feb 2009
Posts: 5,872 |
Best load right now IMR 4831 set at 45 degrees, 70.8 grains on 200 grain ELDX. I could not get the 220 grain ELDX to group no matter what I tried. Best load on 180 grain SST is also 70.7 grains.
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Re: 300 win mag powder??
[Re: sauce06]
#6750738
05/01/17 01:39 AM
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Joined: Nov 2007
Posts: 9,516
RiverRider
THF Trophy Hunter
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THF Trophy Hunter
Joined: Nov 2007
Posts: 9,516 |
"Arguing with you always makes me thirsty." -Augustus McRae
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Re: 300 win mag powder??
[Re: sauce06]
#6750816
05/01/17 03:06 AM
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Joined: May 2010
Posts: 536
cazador1022
Tracker
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Tracker
Joined: May 2010
Posts: 536 |
Seems like you guys have the .300wm under control. I have a Tikka in .300wm.
All right boys....Ive got this powder in 1LB cans, win 760, H 335, IMR 4895, and Reloader 15. Please give me any advice. on loads you would recommend.
BTW heavy bullets. 178s and 180s
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Re: 300 win mag powder??
[Re: cazador1022]
#6750829
05/01/17 03:22 AM
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Joined: Mar 2016
Posts: 365
Huckleberry75
Bird Dog
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Bird Dog
Joined: Mar 2016
Posts: 365 |
Seems like you guys have the .300wm under control. I have a Tikka in .300wm.
All right boys....Ive got this powder in 1LB cans, win 760, H 335, IMR 4895, and Reloader 15. Please give me any advice. on loads you would recommend.
BTW heavy bullets. 178s and 180s Start here......none of those powders are ideal for a 300wm. Only W760 is even mentioned on their load list and its one of the slower options. For a 300wm with 180's, you will want to find IMR 4350 / IMR 4831 / IMR 7828 or H1000, to name a few. http://www.hodgdonreloading.com/data/rifle
Are you going to pull those pistols, or whistle Dixie?
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Re: 300 win mag powder??
[Re: RiverRider]
#6750903
05/01/17 11:45 AM
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Joined: Feb 2009
Posts: 5,872
GLC
THF Trophy Hunter
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THF Trophy Hunter
Joined: Feb 2009
Posts: 5,872 |
That was just the air temp that I was shooting that morning where I got the best grouping. Some say that The IMR powder is temp sensitive. I tend to write down everything when doing load workups. Little OCD that way.
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