I used when I had a 220 swift and it shot great with a 52 gr bullet but rarely is it ever mentioned here on the "Fire".

Doc

Year go way way back I ran it in a 17 Rem

Dober

It does well in the 300 Savage and 308 Win. with 150 grain bullets.

For me it has worked well in .22/250, .30/06, and even .222 Remington, where it is
a compressed load.


Burn rates for 4064, 4320, & 4895 seem very similar.

All worked well but IMR 4320 flows throw powder measures almost as well as ball powder, due to small grain size. IMR 4895 measured almost as well. 4064.

I think that newer powders and 4895 have taken the place that 4320 used to occupy.


Bob

58 grains 4320 under a 150 in my tikka 300 win mag makes a fun reduced load that shoots sub moa. Does about 2780 fps and is PERFECT for brush hunting whitetail here in Wis where shots are rare over 100 yds.

It works great, when nothing else I tried would, in my 243 with 100gr Nosler Solid Bases.

I use IMR 4320 in a 17 Remington

Best powder I've ever tried in .350 Rem Mag and 8x57. I expect it would work as well in .35 Whelen and also in .375 H&H.

GH

I've used it in my 35 whelen with 250 speer spitzers

It is a very good powder in the 35 Whelen. I believe it can be considered the first "short cut" powder, as it had the shortest grain in the original family of IMR powders.
I think one of the 2006 issues of Handloader had a write up on 4320.

It was by ar the best in the .22-250 with the 55 Nosler. Typcally he accuracy was five shots at 100 yards about 5/8". The velocity averaged 3,775 feet per second.

It is the powder of choice for my .375-.416 Rem with 265 G.S. Customs at 3,055, 260 Noslers at 3,000 or 270 TSXs at 2,950. Depending on which bullet and how I am doing that day the groups range from a best of 1/16" at 100 yards with the G.S. Customs to 1 1/2" at 100 with the TSXs. I shot three groups the other day with the Noslers at 300 yards. Two of the groups were 3 3/8" and one was 3 5/8".

IMR 4320 is a great powder. My first "love affair" with it began with 150 BTs in 30-06 - loaded to max according to IMR Reloader's Guide. THe 358 Win shoots the 225 Sierra GK into tiny little groups with 4320 and about as fast as it can safely be pushed in that case. A 6mm I had loved 4320 with the 87 grain Hornady. In recent years I've burned more pounds of 4320 to push the 64 grain Power Point through the barrel of my 223. It is a really excellent, if somewhat neglected powder.

Truth and ultimate worth are not decided by democratic principles nor by the wallets of the people. Unfortunately it is the wallet which ultimately decides what we have or don't though. Long live 4320 anyway!

It is a tack driver in a 223 with a charge of 27.5 grains and a 55 grain bullet....

34.0 grains of 4320, with 52 grain bullets in a 22-250 was THE load years ago.

Don

It's funny. I have a copy of a book titled "Propellant Profiles" which I consider an invaluable resource, partly because it's a bit dated and I often get questions about some old powder or other.

But in the review of 4320, the writer damned it with faint praise. His analysis showed that 4320 seldom produced peak velocities nor the tightest groups, but that it was a solid if unspectacular performer in many rounds. Ho hum.

I avoided using any 4320 for years because of that article. Until I started doing my own bookcrawling. It turns out that while 4320 does not produce top velocities in many rounds, it is off by only a very few feet per second - not enough to matter. Many loads were reported with second-place accuracy, and again, not enough behind to matter. Hmmmmm, thought I.

Bought a can. Loved the way it flowed and how charges were nearly identical. Confirmed that it delivers very respectable speeds and darn pretty groups in every round I stuffed with it, from 223 through 7-30 Waters to 308. Hmmmmm again, thought I.

Now, that dark green can has an honored place on my shelf. It's a keeper.

About a year or two ago I asked in the reloading section if IMR 4320 had become a forgotten powder.Recieved many positive replies if I remember correctly.Always had great results using it in my '06.

Certainly it has has fallen by the wayside for some but it is a great powder that has fallen out of favor not by any shortcomings but by the the introduction of newer and more versatile propellants.

I will be hunting with it this week in my 405WCF behind a 300gr Hornady. It produces 1 1/2" groups @ 100yds (as good as I can shoot with a peep) from my Win'95 at a little over 2200fps.

Don`t overlook it in the 243 with 70 grain bullets.

IMR 4320 delivered the most accurate load according to Barnes when used with a 200 grain TSX in the .325 WSM. I just loaded some up, but I dont have a scope for the gun yet. Results pending!

I use it in my .270 Weatherby Mark V & Swift Sirroco's 5 shot covered by dime. I also used it with .257 Weatherby Vanguard, 75 grain V- Max for 3 shot 1 hole group back to back, Then went south, ? if dirty barrel, I just can't seem to get consistent 75 grain v-max with RL22, the 4320 was the best, am out of 75 V-maxs so back to the TXS 115 - Load was with RL 22 but am going to work up 4320. ? if .257 Roy is just not really a varmit gun ya know. Barrels get too hot in summer

Use it 22-250 50 gr. or 55 gr. V-max, 36 grains or 4320 bug holes. It is hard to find load data excpet in old books.

It's my favorite 22-250 powder in conjunction with a 55 gr. Ballistic Tip. As previously mentioned, it's not something for getting maximum velocity. I could be getting a couple hundred more fps with other powders but 4320 is so darn accurate and consistent that I keep using it. In my varminting experience with it I don't think a couple hundred fps ever made a bit of difference to any of the woodchucks that "participated" in some of my load development testing projects.

I use it for my .350 Rem Mag Model 7 KS. I use 58grs of it with Nosler 225gr Partitions and CCI 250 primers and C.O.L. of 2.825". I get 1" to 1 1/4" 100 yd 3 shot groups. Never measured velocity but must be around 2500fps out of the 20" barrel of this rifle. I consider it a go to powder for most .35 calibers.

G2

I used 53 grs of it with a 250 gr Speer in my 35 Whelen to take a nice 11 pt buck Saturday morning. 55 grs actually shoots a little tighter but at close range the deer don't appreciate the extra accuracy anyway.
I bet it would work well in the 220 Swift although I haven't tried it yet.
My old shooting partner used it in his 308 target loads years ago.
whelennut

I use it for launching bullets from some of my shorter barreled rifles.

I used it in loading for a triple duece .222 rem with 50-52gr bullets. I really liked the powder and it gave very good accuracy.

CK

I use it in my 358Win to launch 200 Bullets.

I use the same load with Swift 225gr in a .350 Rem Mag 673 Gude Gun. Great load that accounted for a nice black bear last year. Am working on a 35 Whelen load with the same powder.

Doc,

Jack O'Connor used 45 grains of this powder with both 140 grain Sierra flat base (now Pro-Hunter) and Nosler Partition bullets in his 7x57 rifles. He hunted both here and in Africa with this load. 4320 was an excellent powder then and, in my opinion, it still is. I have used it to load for the .243 Win., .250 Sav., 7x57, ,308 Win., .30-06, and .338-06, and it has always performed well as long as I did not push for highest possible velocities. It was what I used for my best loads in the .338-06, and I still use it today to load for the .250 Sav. and .30-06.

If my memory serves me correctly, this powder was dropped from the IMR line in about 1980. I thought I was really lucky to find an 8# keg before it vanished from dealers shelves; however, I needn't have worried because it was brought back in a year or two because of user demand. Evidently, there were, and are, a good number of us who find this propellant GOOD FOR excellent handloads!

M. Bell

IMR 4320 is a good powder but since Hodgdon bought them out try to find a load for it that isn't in one of your manuals. They have more or less gutted the IMR on line loading manual. Looks like they really bought them out just to let that competition die. But time will tell. All of the Weatherby data that was on the old IMR site is gone? Only some of the rest of it remains and a lot of that information has been down loaded as in reduced load wise?

Back in the 70's 4320 was the "go to" powder for 52 grain Silver Match bullets in the 22-250. 36.5 grains of the stuff burned as clean as any, and if all 10 were not under 0.35 MOA, you messed up.

Wayne

I found 2 cans of 4320 for $15. each and bought em in honor of this thread to try in my 358 and 35 Whelen.

It may be old school but I have lots of very good ways to burn 4320 at $15 a pound. Nice deal!

I knew there was a reason I have 2# on hand so I checked my load book. It looks like it's one of my better .22-250 load powders.

I used to use in a 22-250 and a 220 Swift years ago. Must have used a lot of it because I have a bunch of notes where I generally used the 60 gr. Hornady on coyotes in those two rifles.

My 243 winchester likes it with 100 gr bullets.

My 243 Win liked it with 85gr Barnes TSX's.

That is my recipe in my BLR. Very accurate. I also use the partitions in the same weight-but it isnt as accurate as the sierra loads.

60 grains and a 225 grain bullet in 35 Whelan. 43 grains in a 300 Savage 150 or 165 grain bullets.

Soo 55.0 grs. of 4320 is a top load using the 250 grain bullet and 60 grs. works with the 225 grain bullets. All I need now is a top listed load for 200 grain bullets and I'll have somewhere to start with my 35 Whelen. Anyone have a spread for the 358 Winchester? I'll be using 200 and 250 grain bullets in it.

From Nosler 5th Ed Max Loads IMR 4320

35 Whelen
180 gr blt - 56.0 gr powd
225 gr blt - 55.0 gr powd
250 gr blt - 53.0 gr powd

358 Win
150 gr blt - Not Listed
200 gr blt - 47.0 gr powd

From IMR 2006 Reloading Guide

35 Whelen
180 gr blt - 56 gr powd
225 gr blt - 54 gr powd
250 gr blt - 53 gr powd

358 Win
150 gr blt - 42.5 gr powd (Rem SPCL)
200 gr blt - 38.5 gr powd (Horn RN)

rick,
FYI 55 grs. is the max load for the 225 gr. Partition in the Nosler manual. (Also the most accurate load tested.)
whelennut

Thanks a lot Rem260 just what I needed. I recently loaded some Hornady 250 RN's with AA4350 (58 grains) and the load shot real well at 2400 fps guestimated.

60 grains of 4320 and the Nosler Part. is right out of the Lyman # 47 and was safe in my Rem Classic 700.

I expect the 60.0 grain loading is for the 225 grain Partition?

sorry-- yes it is for the 225 Part.

37gr behind the 75gr Sierra HP or Hdy V-mav and the 100gr NBT is super accurate in my 250-3000 700 Classic, as well as the 87gr Speer hotcore in my 99 Savage. 43gr and the 85gr NBT in my 257 Bob 'chuck rifle shoots .5" and smaller five shot groups.