Powder Identification - 4198

[AF_Reloader]

I've been doing some tinkering with low velocity, light weight bullet loads for my .270 Ruger. Jack O'Conner had a light weight load he like to use on turkeys/small game, and that just sounds like fun to me (plus I have 200 110 Sierra bullets lying around).

As usual, for information I turned to Ken Water's Pet Loads. Here's the info:

110 Sierra Spitzer SP
21gr 4198
Federal Case
Federal 210 Primer
etc

However, 21gr of 4198 powder is all the information that is listed, which is odd, since all the other powders have identifiers (W-W, IMR, H, etc). I've only been able to find one instance of a 4198 powder, and that is IMR-4198. However, the load data in this particular article was published in 1977.

Anyone think it is possible that the 4198 powder listed (in 1977) is anything other than IMR?


Frank

 

[coxhaus]

I don't have a definite answer but back in the early 70's the main powders I saw was IMR and surplus military powders. IMR was a couple of bucks a can and military surplus was $0.25 a pound.

 

[qajaq59]

I looked in one of my old manuals from the mid 60s and the only 4198 I could find was IMR. Someone may have an older manual though.

 

[Remo-99]

All I know is 4198 is a damn fast powder for 270win and 21gr ain't gonna fill the case a whole lot.
The only loading I done with H-4198 in a 270win was with cast bullets. That was using a 130gr GC'd, but I was using more than 21grs of H-4198.
Haven't tried IMR-4198, but their burnrates are similar, although not exactly the same powders, now. Maybe they were at one time.

 

[MMCSRET]

Prior to the introduction of H4198 there was IMR4198 and since it was the only 4198 they did not bother to include the DuPont identifier(IMR) as it was deemed redundant in typesetting and typewriting. I don't know when H4198 was introduced but it is a safe bet that when you see only the # it is IMR. Same goes for 4350. 4831 was introduced by Hodgdon and IMR4831 didn't appear on scene until 1973, so if you see 4831 with no modifier it is H4831. Confused sufficiently yet? I am!!!!!!!!!!!
And all these powders will work in the 270!!!!! Good shooting.

 

[AF_Reloader]

21gr is going to feel like a drop in the bucket compared to my normal .270 loads, but that's the whole point of this load testing--light bullets at 1200fps or so below average .270 muzzle velocity, accurate and light enough to make shooting turkeys and small game fun with my .270. And as I said before, I gotta do something with all these 110gr bullets lying around!

Thanks for all the imput. I'm going to go ahead and say that 4198 means IMR-4198 and start loading. I'll post the results in a later thread.


Frank