H-4198 -- imr-4198 ?? (30BR)

T

tootalloutdoors

Guest
--------------------------------------------------------------------------------
Well crap.. I went to pick up some 4198 to begin my 30br loadings.. I guess I just saw the numbers 4198 on the shelf and grabed it.. I had H-4198 written on my list, and always like H powders.. Well I just noticed that I grabed IMR instead..
The chart on the Hogdons site lists IMR right next to their H-4198.. So my obvious question now is, What difference will it make to substitute the two? Has anyone used the IMR-4198 in the 30br??

Kelly
 
The IMR might be a longer cut powder and you mightnot be able to get as much as the H4198 into the case.
The IMR probably won't "dump" as well out of a powder measure.
 
It probably is a longer cut than Hogden as Joe suggested and two burning rate charts I looked at showed it as somewhat slower than H4198 so if you bought more than a couple pounds and can easily return it I would suggest you do so. On the other hand if you just bought a pound or two do not worry about it just shoot it.

Either way it will probably not meter as well through a powder measure as the Hogden
Dick
 
I tried a little IMR 4198 from an old lot that Jeff Summers used so effectively a long time ago in a PPC. With the 30-BR, I found it a touch *faster* than H-4198 (the magical lot of which I still have 7 pounds left), not slower.

So, they are probably pretty close. If you only have a pound or two & it works good, you likely can't get anymore. But if you have 8 pounds, likely it won't shoot so well. That's the law of "the general cussedness of things."

If you decide to give it a try, as with all untried powders, start a little low & work up.
 
I was in a local gun shop late last year, want to pickup a pound of H4198 to blowout cases and they were out of stock, dealer had 6-8 one pound cans of IMR4198, so knowing Hodgdon had bought them I called the hotline and they(hodgdon) told me the two where a little DIFFERENT but with a little load development they would be pertty close, in short, I bought one, fireformed the 100 pieces of brass then put the rest in my loading locker until needed
 
Took it back to trade it, but they had no H-4198.. Brought it back home, and gently slipped, tapped, 34 grains into the case, but it was about 1/4" under the top of the case, and when compressed it would not hold my seating depth.. Going back to town today..

Kelly
 
You must log in or register to reply here.
Back
Top