IMR4895 and H4895

[HVFDfirefighter]

My local dealer is out of pretty much everything.

I am reloading 280 Remington using a 140 grain jacketed bullet. I have been using 43.5 Grains of H Varget but am almost out of it. I have 5# of IMR4895 that I use for other calibers. IMR4895 is not listed in my book. H4895 is listed.

Are IMR4895 and H4895 the same?

Has anyone worked up a load for 280 Remington with a 140 grain jacket bullet using IMR4885?

All help is greatly appreciated.

 

[CoalCrackerAl]

This should help.

IMR 4895 & H4895 Differences?

None of my books, nor Hodgdon's website have load data for a 160gr cast boolit using IMR4895. They do have a 17.5gr starting load for that boolit with H4895. Go down the page to different 160gr factory bullets and they have data listed for both powders. All I need to know is if 17.5...

www.thehighroad.org

 

[VoodooMountain]

H4895 and IMR are not the same. They have a similar burn rate but load data are not interchangeable

I don't have any load data for the 280 using that powder but usually loads for h4895 are only 1 grain different than IMR.

I know people have used IMR4895 for 280 but this also comes with all the caveats of getting unpublished data from the web

 

[doubleh]

They are different. Buy a Lyman manual and you will find proven data for both. I am by internet load data from an individual like I am someone else's reloads. Either might be just fine but I prefer not to take a chance.

 

[243winxb]

https://stevespages.com/page8a.htm This may help. Basic generic information. Different components = Different pressures. Just a starting point, to compare.

 

[Hooda Thunkit]

From the info supplied by @tominboise (and Hodgdon) it looks like IMR4895 is a tad faster than the H variety.

That is my experience also.

As an aside, I have that Hodgdon #25 manual. I find myself referring to it more often than one would suppose.

 

[41 Mag]

I can tell you from past experience it isn’t interchangeable and neither are IMR and H-4350's, especially with a decent upper end load

 

[J-Bar]

One thing H4895 has going for it: it can safely be downloaded to 60% of the maximum charge and still provide accurate groups. In case you might ever want to reduce recoil. I did when I injured my right shoulder. Still took two deer with the reduced .270 Winchester loads.

https://www.ballisticstudies.com/site/ballisticstudies/files/Hodgdon%20H4895%20reduced%20load%20data.pdf

 

[.45Coltguy]

In my Lyman #50 manual, there are no loads for the .280 Rem using jacketed bullets and any of the 4895's. Only in cast is IMR4895 refered to for .280 Rem.
tominboise' post should help.

 

[Thomasss]

From Loaddata.com I found the following:
All recipes recommend working up a load. All recipes recommend bullet seating depth 3.300 to 3.330
Then: Hand Loader Aug 2008 #254 140 Sierra SP 43.5 @ 2805 fps from 21 inch barrel using WLR primer.
Then Remington data: 26 inch barrel 140 Nosler Accubond, 40 to 44 @3.300 2580 to 2840 fps using Fed 210 primer
Then Sierra manual: 21 inch barrel; Sierra SBT or SPT, 41.6 to 45.2, 2622 to 2806 fps, Trim to 2.530 using WLR primer