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They ARE different powders. BUT, so are two different batches ("Lots") of H-4198 or two different batches ("Lots") of IMR-4198. Anytime you change from one "Lot" to another, if you are running at the absolute upper edge pressure-wise, you should re-work your load. Whether you need to do so when working at lower pressure levels is something you will develop a feel and instinct for over time. If you haven't used a particular powder long enough to really get a secure working "feel" for it, work up all loads until you "know" that powder. Alberta Canuck | ||
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When I compare two powders to see if they are the same, I: 1) look at them 2) smell them 3) measure the density 4) test how much powder is needed for .001" extractor groove expansion. That is how I know that Ramshot Enforcer and AA#9 are the same. Send me a pound of IMR4198 and a pound of H4198 and I will test them. Quote: Great line, Swede 44mag, can I use that? They are canister powders now, not bulk military. Does anyone happen to have the specifications for them? Or are we mushrooms? | |||
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Moderator |
Quote:Quote: Kory, let's look at this 1: they were different companies for 50+ years 2: As DIFFERENT products, from different lines, they are DIFFERENT powders 3: there's 50+ years of reloading manuals that call for ONE or the OTHER, and not at the same loads. 4: blending them into ONE powder would make all those loads either 1: unsafe, or 2: under energized 5: why don't they blend anyway? can you say "product liability lawsuit" 6: one of the absolute first things listed as a "do not do" in most reloading manuals is to extrapolate loads based off relative burn rates. 7: since i redo loads for merely changing primers, there's NO WAY IN HELL i would not rework loads for a DIFFERNT powder. in short, since these powders are simular to each other, there is a HAZARD of mixing them up. or, as you say, they have the same LAST numbers, i would suggest to you that the FIRST character is the critical issue... I aint H... it may become so in the future... but today, it aint jeffe | |||
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