4895 Powder
- Thread starter Bad Bob
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Falconflyer
CGN Ultra frequent flyer
The burn rate of H4895 and IMR4895 are reportedly within 5% of each other according to ADI World Class.
I have used equal weights of H4895 and IMR4895 with the same bullet, brass and primer with no discernable differences in performance. I know they are not "the same", but very very close for all practical purposes. The only difference is that H4895 meters nicer due to it being short cut. No experience with D4895 at all.
gewehr76
CGN Ultra frequent flyer
D4895 is weird. There were few batches of it that was made looking like normal 4895 and then there was a batch that was made like 4198. The granules were cut different length as well, which made it difficult to meter. I have this powder in 5 lb jugs, so usually new load have to be developed when new jug is used. Its different from jug to jug
You'll find "different from jug to jug" is true of the majority of surplus powders. - dan
gewehr76
CGN Ultra frequent flyer
D4895 is different animal than either IMR or H4895 and in no way interchangeable with these powders. As I said each jug of D4895 can have different burn rate, can look different and perform similarly, to its stated powder equivalent but its not as close as H and IMR to each other.
OP, your question is a bit difficult to answer because of changes over the last few years to manufacturers.
D4895 as mentioned above is not interchangeable with IMR or H 4895.
IMR4895 is generally faster than H4895 in my experience but the variations from lot to lot in burn rate can be surprising.
Hodgdon's now owns the IMR line of powders and very likely one or the other will be discontinued, for cost reasons. Which brand name will get the nod ????
There is no way to tell with either powder how fast it will be, until you load a few and check the results. That's why it's a good idea to keep records and record range fired groups. It gives you something to compare and an idea of what to expect.
You will find that IMR powders are usually very close these days and lot to lot consistency is very good, same goes for H powders.
However, they are definitely two different burn rate designations and the information should never be interchanged, if reliable info for either is available.
If you're in the position where you only have information for one powder, use starting loads to develop your charges.
When I have no other option, I will usually use the IMR loads as a starting point, because most IMR powders are faster burning than their H counterparts.
Between the two, you're going to be in a similar burn rate, and the bulk, which is important is almost identical.
I would use IMR chart rates if you don't have H info. If you have H info and IMR powder, definitely use start charges.
D4895 is a toss up. I have a couple of jugs and I went with IMR start loads. I bought one jug from the first lot brought in and liked it, so bought another from the second lot. They are not the same by quite a margin and the second lot was much faster.
I blended both lots together to make one consistent lot and that will save a lot of time and primers.
D4895 as mentioned above is not interchangeable with IMR or H 4895.
IMR4895 is generally faster than H4895 in my experience but the variations from lot to lot in burn rate can be surprising.
Hodgdon's now owns the IMR line of powders and very likely one or the other will be discontinued, for cost reasons. Which brand name will get the nod ????
There is no way to tell with either powder how fast it will be, until you load a few and check the results. That's why it's a good idea to keep records and record range fired groups. It gives you something to compare and an idea of what to expect.
You will find that IMR powders are usually very close these days and lot to lot consistency is very good, same goes for H powders.
However, they are definitely two different burn rate designations and the information should never be interchanged, if reliable info for either is available.
If you're in the position where you only have information for one powder, use starting loads to develop your charges.
When I have no other option, I will usually use the IMR loads as a starting point, because most IMR powders are faster burning than their H counterparts.
Between the two, you're going to be in a similar burn rate, and the bulk, which is important is almost identical.
I would use IMR chart rates if you don't have H info. If you have H info and IMR powder, definitely use start charges.
D4895 is a toss up. I have a couple of jugs and I went with IMR start loads. I bought one jug from the first lot brought in and liked it, so bought another from the second lot. They are not the same by quite a margin and the second lot was much faster.
I blended both lots together to make one consistent lot and that will save a lot of time and primers.
I have (had) two different lot numbers of D4895. In my .223 loads I can't get enough powder in the case to overload them with a 55gr bullet. Lot#1458 shoots slower than the manual results for IMR, and I'm now into my 5lb jug of lot #1459. It chronos about 25fps slower than lot 1458 in my rifle.
Auggie D.
Auggie D.
D4895 is different from lot to lot.
