dgradinaru
CGN frequent flyer
- Location
- British Columbia
Well like the title says? Whats the diffrence? And can you interchange data for one another?
Imr 4895 vs h4895
- Thread starter dgradinaru
- Start date
You cannot interchange the load data between the two. Although I noticed on the calibers I reload (plan to reload for) list both 4350 types but they have different amounts of powder listed, and different muzzle velocities.
There was another thread about this recently I seem to recall but cannot find at this exact moment....
There was another thread about this recently I seem to recall but cannot find at this exact moment....
TargetAcquired
CGN Ultra frequent flyer
- Location
- S. Ontario
As mentioned, I think they are neighbiours on the burn rate chart, but for the calibers I reload I don't think there is data for both powders in the same bullet: i.e. imr4198 is described as a preferred powder for several projectiles in .444 (and i have some awesome loads using it), h4198 is not even on the map.
Exact interchange? No.
I have both powders at the moment. If I were to look at this, I would see what a particular amount of powder gives me in FPS, and compare what I would get in FPS with the same amount of the other, and of course back off 5-8% to work up a load.
Again you speak, and bul@#it comes out. You should reference data before you give advice. The computer screenshot below showes for two common 308 cartridges (for which 4895 of either variety is excellent for) and the IMR 4895 is faster towards the maximum range in velocity but advertised as less temperature stable compared to hodgdon's extreme powder lineup.
A long time ago, in a land not so far away, Dupont, through its subsidiary arm, C.I.L. (name changed from C.X.L.) built an explosives plant in Quebec to supply energetics (neat word for propellants & explosives). DuPont much later became IMR (exclusive distribution by Hodgdon) but the plant is now owned by General Dynamics.
4895 was used in a few military calibers, like the .30 U.S. Springfield. There was no alphabet soup at the beginning of the name, because Hodgdon (who bought a whack of it from the military after the Second World War, was the only place you could get it. Same with all of the single-base stick powders being sold in the 50's. Then DuPont started selling new manufactured powders; enter IMR 4895, amongst others. Hodgdon then called his powders H-4895.
Before Hodgdon got the exclusive distribution rights for Quebec-manufactured powders, he went to Australia Defence Industries to get N.A. powder distribution rights for their powders. Before that, Nobel in Scotland made their powder, then Bofors in Sweden made it. Now new H4895 (ADI 2206H) is different from original 4895 (U.S. surplus), DuPont's IMR 4895, Hodgdon's later Scotland-made H4895, still later Sweden-made H4895, later-again Quebec-made H4895 & newer still Australian-made H4895.
4895 was used in a few military calibers, like the .30 U.S. Springfield. There was no alphabet soup at the beginning of the name, because Hodgdon (who bought a whack of it from the military after the Second World War, was the only place you could get it. Same with all of the single-base stick powders being sold in the 50's. Then DuPont started selling new manufactured powders; enter IMR 4895, amongst others. Hodgdon then called his powders H-4895.
Before Hodgdon got the exclusive distribution rights for Quebec-manufactured powders, he went to Australia Defence Industries to get N.A. powder distribution rights for their powders. Before that, Nobel in Scotland made their powder, then Bofors in Sweden made it. Now new H4895 (ADI 2206H) is different from original 4895 (U.S. surplus), DuPont's IMR 4895, Hodgdon's later Scotland-made H4895, still later Sweden-made H4895, later-again Quebec-made H4895 & newer still Australian-made H4895.
I may have read it wrong, but, the Hogdon website lists both H4895 and IMR4895 as being non-temp sensitive.
The other big ticket item that helped Hodgdon get going was surplus H4831 which was reclaimed from 20mm cannon ammo after WW2. The stuff could be bought cheap by the pail-full. When I was stationed at Ft Leavenworth, KS in the early 1980s I took the opportunity to visit Hodgdon's big indoor range on the east side of Kansas City. It was quite an impressive facility.
Interestingly, the vast majority of surplus powders after WW1 were re-cycled and used in the production of paint.
I understand that the IMR line of powders are again being produced in Canada. I thought about how the pipeline on this works when I was down in Washington State a couple of days ago looking at a full selection of IMR powders which are pretty tough to find on the shelf in Canada these days.
Interestingly, the vast majority of surplus powders after WW1 were re-cycled and used in the production of paint.
I understand that the IMR line of powders are again being produced in Canada. I thought about how the pipeline on this works when I was down in Washington State a couple of days ago looking at a full selection of IMR powders which are pretty tough to find on the shelf in Canada these days.
- Location
- Newmarket,Ontario
it is tough to find the H4895 also. I picked up 2 lbs at Lebaron in Markham two weeks ago and considered myself lucky.
While I do not use them interchangeably, I have used both a lot.
Very versatile, and quite close in burning rates.
Doubt one would get into trouble if they inadvertently substituted one for the other if the load was not at max already.
Still it is wise to adhere to safe loading practices at all times. Regards, Dave.
Very versatile, and quite close in burning rates.
Doubt one would get into trouble if they inadvertently substituted one for the other if the load was not at max already.
Still it is wise to adhere to safe loading practices at all times. Regards, Dave.
