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Joined: Jul 2005
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Campfire Tracker
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OP
Campfire Tracker
Joined: Jul 2005
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Rummaging through my stash, I found a jug of IMR 4320 that I don't remember buying (probably 15 years ago), and I certainly don't remember loading anything with it.
What does IMR 4320 do well? 223, 30 cal? Anyone have any pet loads for this stuff?
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Joined: Dec 2016
Posts: 33
Campfire Greenhorn
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Campfire Greenhorn
Joined: Dec 2016
Posts: 33 |
I know the 06 likes it with a 150 grain bullet. My experience with it is usually in long action cases but have heard it works well in 308 length cases also. Think that just about anything you would use imr 4064 on it would use 4320 with a little adjusting.
(Liberalism is a mental disorder, Michael savage radio show) member of donald's deplorables
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Joined: Dec 2006
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Campfire Ranger
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Campfire Ranger
Joined: Dec 2006
Posts: 28,172 |
I like it in 308 and in 8X57 Mausers of various flavors.
I used it a lot when R 15 was scarce. IMO it works just as well.
Hunt with Class and Classics
Religion: A founder of The Church of Spray and Pray
Acquit v. t. To render a judgment in a murder case in San Francisco... EQUAL, adj. As bad as something else. Ambrose Bierce “The Devil's Dictionary”
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Joined: Dec 2014
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Campfire Outfitter
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Campfire Outfitter
Joined: Dec 2014
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4320 can be tricky. I won't go on here with my extensive experience with it....instead, I recommend you google up Norma Burn Rate Chart. In my opinion, the best chart available to us handloaders, in that it rates powders in two areas, relative velocity AND relative pressure. I'm not aware that any other burn chart does this. When you look at the chart you will note that 4320 is on the faster side of 4895, right down near 3031. And that reflects my own experiences. All the other charts have it up around H380 pretty close to W760. And, with light for caliber bullets, it most likely is. But when you start going off the rez with heavier bullets and changing bore diameters, you will see some amazing velocity progressions on your chronograph. It's an excellent powder, just respect it.
Well this is a fine pickle we're in, should'a listened to Joe McCarthy and George Orwell I guess.
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Joined: Apr 2010
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Campfire Outfitter
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Campfire Outfitter
Joined: Apr 2010
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It’s the only powder I use for the 300 Savage. Works good in the 17 Remington too.
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Joined: Feb 2015
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Campfire Tracker
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Campfire Tracker
Joined: Feb 2015
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I use it for 22-250, .223 . It is a pretty versatile powder in many cartridges.
~Molɔ̀ːn Labé Skýla~
3-7-77
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Joined: Mar 2003
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Campfire Tracker
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Campfire Tracker
Joined: Mar 2003
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My favorite in the 17 Remington and the 35 Whelen.
Chronographs, bore scopes and pattern boards have broke a lot of hearts.
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Joined: Nov 2012
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Campfire Tracker
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Campfire Tracker
Joined: Nov 2012
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Worked great in my 243 with 62gr varmint grenades
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Joined: Jan 2004
Posts: 3,366
Campfire Tracker
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Campfire Tracker
Joined: Jan 2004
Posts: 3,366 |
I know the 06 likes it with a 150 grain bullet. My experience with it is usually in long action cases but have heard it works well in 308 length cases also. Think that just about anything you would use imr 4064 on it would use 4320 with a little adjusting. Think of IMR 4895 that meters like ball powder, you might have to add half a grain more to equal 4895/4064 loads.
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Joined: Sep 2010
Posts: 19,179
Campfire Ranger
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Campfire Ranger
Joined: Sep 2010
Posts: 19,179 |
When you look at the chart you will note that 4320 is on the faster side of 4895, right down near 3031. And that reflects my own experiences. All the other charts have it up around H380 pretty close to W760. . That’s diff from my experience. 4895 is ‘slower’ burning than 3031 And 4320 is ‘slower’ burning than 4320 > but faster burning than 4350. I used 4320 in the 35 Whelen w/200 & 220 (?) gr bullets. It did exceptionally well. J D Jones said to me in the 80s that 4320 was THE powder for the Whelen I know, - diff interpretations. I’ve never read that 4320 was so close to 3031. I recommend that You compare powder burn rate charts for yourself. I know what I’ve seen/experienced. Go slow in making your decision. Jerry
jwall- *** 3100 guy***
A Flat Trajectory is Never a Handicap
Speed is Trajectory's Friend !!
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Joined: Aug 2004
Posts: 7,578
Campfire Outfitter
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Campfire Outfitter
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Great choice for the 338-06, so I am not surprised it works well in the Whelen as well.
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Joined: Apr 2003
Posts: 6,843
Campfire Tracker
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Campfire Tracker
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I have a 243 that would not group worth a flip until i tried some 4320 with 100gr Solid Bases. Presto, tiny groups. Never know til you try it.
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Joined: Feb 2001
Posts: 7,980
Campfire Outfitter
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Campfire Outfitter
Joined: Feb 2001
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Works great in my Remington 7600 35 Whelen
Last edited by kk alaska; 12/03/19.
kk alaska
Alaska 7 months of winter then 5 months of tourists
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Joined: Apr 2004
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Campfire 'Bwana
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Campfire 'Bwana
Joined: Apr 2004
Posts: 42,878 Likes: 8 |
I don't remember the author ( gun writer) who published it, but I remember reading it on one of the websites..
When Varget was scarce, 4320 was recommended as a viable replacement.. it was available, was close to the same burn rate as Varget, to the tune of stating one could start off with starting loads of the two powders interchangeably...
IIRCm the site was like the 6BR web site....
I've found it pretty darn accurate and not real finicky, like most of the older IMR powder lines...
burn rates for 4064, 4895, and 4320 are pretty darn close...4320 being the slower of the three...
it shines real good in the 22.250, 243, 260, 7/08 from personal experience...
in the 223 with heavier bullets is a darn good choice also....
"Minus the killings, Washington has one of the lowest crime rates in the Country" Marion Barry, Mayor of Wash DC
“Owning guns is not a right. If it were a right, it would be in the Constitution.” ~Alexandria Ocasio Cortez
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Joined: Nov 2019
Posts: 790
Campfire Regular
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Campfire Regular
Joined: Nov 2019
Posts: 790 |
Used it in .22-250, .308, .30-06 without problem. Sometimes faster, sometimes slower than IMR-4064.
Tried it recently in .375 Ruger and got evidence of excess pressure at what were supposed to be starting charge weights.
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Joined: Jan 2005
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Campfire Outfitter
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Campfire Outfitter
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I have not reloaded in a long time, but I liked 4320 in 7mm mag with 130 grain Sierras
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Joined: Sep 2010
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Campfire Ranger
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Campfire Ranger
Joined: Sep 2010
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burn rates for 4064, 4895, and 4320 are pretty darn close...4320 being the slower of the three...
..
Yep ! That’s how DuPont, IMR, has always listed the burn rate since I started handloading in 1975. Jerry
jwall- *** 3100 guy***
A Flat Trajectory is Never a Handicap
Speed is Trajectory's Friend !!
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Joined: Jun 2006
Posts: 2,342
Campfire Regular
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Campfire Regular
Joined: Jun 2006
Posts: 2,342 |
Another IMR powder that has withstood the test of time, versatile while delivering good performance without surprises. Tho I am using spiffy new powders in my 35 Whelen and 300 Savage, they are not delivering superior performance in any real meaningful way. Maybe it should be re-introduced as 4320Creedmore to give it a little buzz. It deserves more attention than it is getting.
Imagine your grave on a windy winter night. You've been dead for 70 years. It's been 50 since a visitor last paused at your tombstone..... Now explain why you're in a pissy mood today.
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Posts: 817
Campfire Regular
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Campfire Regular
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Jack Oconner used it and liked it in 06 size cases. IT meters much nicer than 4064 and the results are very similar. I also like it in the 308, and would try it in others also.
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Joined: Jun 2016
Posts: 406
Campfire Member
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Campfire Member
Joined: Jun 2016
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It proved to be a diamond in the rough for my daughters Rem Model 7 .260, it was very accurate with a Sierra 120gr Pro Hunter in her rifle. Her Remington 700 SPS .260 also loved the IMR4320 with the Sierra 120gr Pro Hunter
Life's Tough, God's Good, Pray Hard!
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