IMR 4198

[Kevin]

I have an extra pound of IMR 4198. From what I am reading about it it is good for 45-70 and varmint calibers like 223.

Hornady says it is a pretty fast burning powder but I can't find any load data for 220 Swift or . 243, both good varmint calibers.

Now 45-70 isn't the same as 223, or even close so what makes one powder good for two - almost different calibers?

 

[FergusonTO35]

4198 is a fast burning powder. That means it excels for applications with low pressure, lots of empty space, and/or light bullets. The .45-70 in most loadings has lots of empty space and low pressure. Here, the fast burning powder can help with ignition and preventing great variances in velocity. The .223 uses light bullets and just doesn't have enough room inside the cartridge for a larger charge of fast burning powder the way that a .220 Swift or .22-250 does. Here, a fast burning powder makes the most out of limited capacity.

Hodgdon lists .243 loads for 4198 with light, varmint type bullets. I think 4198 could be used with the heavier slugs but velocity and perhaps accuracy would suffer compared to a larger quantity of slower powder. I use 4198 in my .30-30 with lead bullets and it does great.

 

[rugerjunkie]

Smaller bore , lighter bullets , a fast powder gives you velocity.
Larger bore , once the bullet starts to travel , you have a greater volume needing to be filled with the expanding gasses and the faster powder is needed to fill that ever growing area of volume made as the bullet reaches the end of the barrel. A slow burning powder in a 45/70 would not fill that void quickly enough to be efficient.

That is how you get two completely different cartridges using the same powders.

Its late and i should be in bed so im not sure if i did a very good job explaining that!

 

[FergusonTO35]

You did. The powder shortage has caused me to rethink my rifle powder choices. I tend to shoot older, low velocity cartridges with lead bullets. Fast burners are a good choice here, they also save powder.

 

[Cary]

I have tried several different powders in my Marlin 1895 45-70. At this time the two 4198 powders are working the best for me ( Hodgdon & IMR). I was using H4198 until the supply dried up and then have switched over to IMR4198 as I have been able to get it. I am told they are very close but are not the same powders. Both have done the job pushing my Lee 340 & Lee 405 home cast bullets. Yesterday I was able to purchase two more 1 pound containers of the IMR4198. In my area the IMR powders have been more available than the Hodgdon powders. I have also worked up some loads for my 30-30 using cast bullets and H4198. If this shortage keeps up I may try it in my 243.
Cary

 

[Clovishound]

I've been using IMR 4198 for my new .223. I got the first pound, because at the time, it was the only powder with listings for the .223 available. A few weeks later, I went by the same LGS, and they had several types in stock. I did some research, and found that other powders require a good bit more powder. Also, they were more $ per pound. I was having good luck with the 4198, so I got another pound while I could. When I get around to trying something else in the future, I may kick myself, but for now I am happy with it.

 

[FergusonTO35]

I picked a bad time to start shooting the .257 Roberts. Both jacketed bullets and medium burning rifle powders are scarce.

 

[Mobuck]

220 Swift and 243 are both somewhat "overbore" and need slower powders to perform best. 4198 is a "fast" powder.

 

[Bucks Owin]

220 Swift and 243 are both somewhat "overbore" and need slower powders to perform best. 4198 is a "fast" powder.

10X.... I use H-4831 for 85-105 gr in my .243. Lighter varmit bullets usually 4895 powered.

FWIW... :wink:

 

[greenmtnguy]

I also use IMR4198 and H322 in my 45/70 loads - works quite well. I tend to use the 4198 on the 400 grn bullet loads, and the H322 on the 300 grn bullet loads. The H322 with 300 grn Hornady or Remington bullet load is very accurate and just under 2100 fps in my 22" 1895 barrel.

 

[johndm1967]

I've used IMR4198 in AR with carbine length gas system, no problems.

Some folks have had issues with this powder in full length gas systems,

just a little too fast burn rate.

 

[Imissedagain]

Speer #10 lists 4198 for both 223 and 45-70. Not listed for 22-250.
3031 is also listed for both.
Don't shoot 45-70 just the 458 WM in a #1 and 223 Rem in a Steyr SL and Colt AR15.