Quiet Burp Posted September 27, 2022 Share Posted September 27, 2022 Safe to use IMR4198 data for H4198 powder? I want to load H4198 (ADI 2207) for .45-70 cartridge with a 500gr RN projectile. In the Lyman 48th Reloading book the table states to use 28.5gr of IMR4198 for 1088fps. Is IMR4198 & H4198 powder interchangeable? Link to comment Share on other sites More sharing options...
Charlie Harley, #14153 Posted September 27, 2022 Share Posted September 27, 2022 No! Not at all interchangeable. I don’t know the history of how the powders got named that way. It’s caused more than one bad outcome. Link to comment Share on other sites More sharing options...
Sedalia Dave Posted September 27, 2022 Share Posted September 27, 2022 27 minutes ago, Charlie Harley, #14153 said: No! Not at all interchangeable. I don’t know the history of how the powders got named that way. It’s caused more than one bad outcome. ^^^^ THIS ^^^^ They are similar but they are not interchangeable. Link to comment Share on other sites More sharing options...
Quiet Burp Posted September 27, 2022 Author Share Posted September 27, 2022 Thanks. Can anyone suggest a reduced load like what Lyman published for IMR4198 for - .45-70 500gr lead round nose and H4198? Link to comment Share on other sites More sharing options...
Quiet Burp Posted September 27, 2022 Author Share Posted September 27, 2022 Found this in Richard Lee's book but it says "bullet" not Lead. Link to comment Share on other sites More sharing options...
Quiet Burp Posted September 27, 2022 Author Share Posted September 27, 2022 Would be very appreciative of any help/advice. Link to comment Share on other sites More sharing options...
Sedalia Dave Posted September 27, 2022 Share Posted September 27, 2022 9 hours ago, Quiet Burp said: Found this in Richard Lee's book but it says "bullet" not Lead. Can you post what each column represents? Does it also list data for H4198 and a 475 grain bullet? Link to comment Share on other sites More sharing options...
Griff Posted September 27, 2022 Share Posted September 27, 2022 1 hour ago, Quiet Burp said: Would be very appreciative of any help/advice. Never rely on just one reloading manual. Buy as many as you like, from as many different sources as you can find. The differences can be subtle, yet significant. Link to comment Share on other sites More sharing options...
Kid Rich Posted September 27, 2022 Share Posted September 27, 2022 What rifle are you shooting that load or loads in? kR Link to comment Share on other sites More sharing options...
The Rainmaker, SASS #11631 Posted September 27, 2022 Share Posted September 27, 2022 Definitely get the data for that specific powder, they can be different. Just use BP and load it to the top! Lol Link to comment Share on other sites More sharing options...
Edward R S Canby, SASS#59971 Posted September 27, 2022 Share Posted September 27, 2022 You could contact the powder distributor directly and ask for a load. Here is a link: https://hodgdonreloading.com/contact. Link to comment Share on other sites More sharing options...
Quiet Burp Posted September 28, 2022 Author Share Posted September 28, 2022 On 9/27/2022 at 9:47 PM, Kid Rich said: What rifle are you shooting that load or loads in? kR Sharps Done a lot of reading, IMR4198 and H4198 are similar enough that at the low end using 28.5 gr of H4198 duplicating a IMR4198 load there won't be an issue. Link to comment Share on other sites More sharing options...
Major Crimes Posted September 29, 2022 Share Posted September 29, 2022 H4198 is ADI- AR2207 rebranded. Look up ADI Load Data on the inter webby thing. here is a starting point. Data – Rifle – ADI World Class Powders and Ammunition ADI Handloaders guide 2013.pdf (ballisticstudies.com) Note that at the end of the loading manual is a Single Action Section with lead projectile loads for Trapdoor rifles. Link to comment Share on other sites More sharing options...
Major Crimes Posted September 29, 2022 Share Posted September 29, 2022 Check this out too. forum.accurateshooter.com I cant vouch for the accuracy on this website- do your due diligence. Link to comment Share on other sites More sharing options...
Quiet Burp Posted September 29, 2022 Author Share Posted September 29, 2022 42 minutes ago, Major Crimes said: H4198 is ADI- AR2207 rebranded. Look up ADI Load Data on the inter webby thing. here is a starting point. Data – Rifle – ADI World Class Powders and Ammunition ADI Handloaders guide 2013.pdf (ballisticstudies.com) Note that at the end of the loading manual is a Single Action Section with lead projectile loads for Trapdoor rifles. Yep thanks, this link you posted -https://forum.accurateshooter.com/threads/imr-4198-aka-adi-ar-2215-and-h-4198-aka-adi-ar2207-im-confused-pls-help.3749983/ I found that the other day in my research and the copy and paste from ADI made me feel very comfortable using 28.5 gr of H4198 pushing a 500gr lead pill. Link to comment Share on other sites More sharing options...
Cpt Dan Blodgett, SASS #75655 Posted September 29, 2022 Share Posted September 29, 2022 They are similar but not identical, published data exists for both as always start low and work up gradually. Link to comment Share on other sites More sharing options...
Major Crimes Posted September 29, 2022 Share Posted September 29, 2022 There is a bit of 2207 still around in some of the Gun stores as well. I think ADI are still making and distr it. Link to comment Share on other sites More sharing options...
Quiet Burp Posted September 29, 2022 Author Share Posted September 29, 2022 6 minutes ago, Major Crimes said: There is a bit of 2207 still around in some of the Gun stores as well. I think ADI are still making and distr it. Yes, I bought 3 x 4kg jugs (2 for me and 1 for a mate) a few weeks ago. Seems like lost gun shops have it in stock......wish it was the same for pistol powders Link to comment Share on other sites More sharing options...
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