What is the big differance between the 2 IMR 4198 vs H 4198 Besides one burns faster than the other back in the day But the new batch of IMR 4198 is new and improved since back when......... Please forgive the dumb new reloader questions
Not really a question of "WHICH" has or hasn't been "improved". The better question is how many times "HAVE THEY".
WHO originally constructed, then who made for a long time, and now who makes them; are all different answers.
One of the many reasons why lot variation is a very real thing, and why you should be mindful of it. Extruded powder has it's burning rate controlled by geometry and surface area. So if the production has shifted to a different set of equiptment, OR another supplier, it maybe slightly different than the last. Also with some of the extruded, many flavors WERE old surplus military powders. Whereas now they are newly(newer) manufactured.
I'm a firm believer in the theory that "If it bleeds, I can kill it"
Quite similar, but there is a difference.
For example, in 444 Marlin H4198 will get about 10% more velocity.
The IMR is easier to find around here though.
"I have a tendency against which I should, perhaps, be on my guard, to swim against the stream..." Winston S. Churchill
Team 444-Member #315
They are not interchangeable.Do not use one in substitute for the other
WDRA, Billy Dixon Emeritus
Team 35 Mbr #75
Team 32 Mbr #27
Team Old Pharts #226
Team Browning #49
Marlin League #155
NRA Life Mbr
Marlin 70HC 22lr
Marlin 60Dlx 50th Ann. 22lr
Marlin 30TK 30-30 18.5"
Marlin 336RC Texan 35R 20"
Marlin 444 24"
Win 94 32Wspl 20"
Win BB94 356W 20"
Win 1873 38WCF 24"
Win 1886 40-82 20"
When it ceases to be fun, I shall cease to do it - Sweetwater
The proof is in the freezer - Sweetwater
Now that Hodgy is having Thales manufacture both the IMR- and Hodgdon-branded versions of 4198, is there an ADI powder designation/number for the IMR-labeled version? If so, what is it?
One would hope that Thales was able to duplicate the burn characteristics of the former Canadian product, but if it was me I'd be watching the Hodgy website closely for the newest data for IMR-4198.
I've always wondered how each powder company determine the numbers.
Look at a wolf, look at a deer, look at a human, look at a black bear. The 30-30 was designed to be the most efficient caliber to down any of them within the range you would most commonly encounter such creatures.