H4895/IMR 4895?

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   Finally got some time to play in the reloading room. Hurricane tree removal is finally almost finished. (I hate hurricane’s). Had some new PPU brass and 180sps I ordered quite a while back. So my new Lee dies have a load chart that says max 38 gr @ 2400 fps for H4895 what I have been using.  And IMR 4895 was quite a bit heavier? I know that they are not exactly the same but they always are pretty close in burn rate. Based on my limited chrono data, 308/3006/45-70. So….? My newest load book doesn’t have a 180 gr load listed, stops at 174 gr bullet. So is there something different with the 303B and heavier bullets? I just started loading 303B and inherited a new jug of IMR 4895. Have both H and IMR now. 
Obtw I loaded up a few H4895 at 36 gr and they seem to group well, limited test so far out of my MkIII. Have not shot over chrono yet. 

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Gatorshooter Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: April 04 2021 Location: Louisiana Status: Offline Points: 37	Post Options Post Reply Quote Gatorshooter Report Post Thanks(0) Quote Reply Topic: H4895/IMR 4895? Posted: March 01 2022 at 5:51am
	Finally got some time to play in the reloading room. Hurricane tree removal is finally almost finished. (I hate hurricane’s). Had some new PPU brass and 180sps I ordered quite a while back. So my new Lee dies have a load chart that says max 38 gr @ 2400 fps for H4895 what I have been using. And IMR 4895 was quite a bit heavier? I know that they are not exactly the same but they always are pretty close in burn rate. Based on my limited chrono data, 308/3006/45-70. So….? My newest load book doesn’t have a 180 gr load listed, stops at 174 gr bullet. So is there something different with the 303B and heavier bullets? I just started loading 303B and inherited a new jug of IMR 4895. Have both H and IMR now. Obtw I loaded up a few H4895 at 36 gr and they seem to group well, limited test so far out of my MkIII. Have not shot over chrono yet.

britrifles Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: February 03 2018 Location: Georgia, USA Status: Offline Points: 8404	Post Options Post Reply Quote britrifles Report Post Thanks(1) Quote Reply Posted: March 01 2022 at 8:18am
	Check the Hodgdon Reloading Data Center website; you will find load data for both H4895 and IMR4895 for 180 grain Sierra. These two powders are quite different and not interchangeable. https://www.hodgdonreloading.com/reloading-data-center