H4895 vs IMR 4895 in a M1A
- Thread starter benstt
- Start date
jumpinjoe
Hellcat
Basically the Hodgdon H-4895 is only slightly faster than the IMR 4895. But then again, Hodgdon has always been slightly hotter/faster than comparable IMR stuff since way back when the Hodgdon stuff was typically military surplus powder.
Generally speaking there won't be a great deal of difference in your results as long as you compensate for the slightly higher pressures and faster burn rate of the Hodgdon stuff.
Look closely at your loading data, trust it, and you'll be fine. You'll see that the Hodgdon stuff will require a little bit lighter charge to obtain the same velocity without any excessive pressures.
Generally speaking there won't be a great deal of difference in your results as long as you compensate for the slightly higher pressures and faster burn rate of the Hodgdon stuff.
Look closely at your loading data, trust it, and you'll be fine. You'll see that the Hodgdon stuff will require a little bit lighter charge to obtain the same velocity without any excessive pressures.
TEXASforLIFE
Ronin
What bullets weights and mfg are they?
TEXASforLIFE
Ronin
Don't forget that hotter won't always get you faster velocity!
TEXASforLIFE
Ronin
The 130 to 135gr is a break even point on velocity, but heavier prefers imr for higher velocities.
TEXASforLIFE
Ronin
What your gun likes you will only know?
TEXASforLIFE
Ronin
I realize that, but just giving weight options when using each and not knowing what bullets/mfg are being used. I don't have a m1a, but would love to have 1! I have very few hogdgon and imr powders with the same numbers.Yessir, when referring to "hotter/faster" we're referring to the burn rate of the powder, not the resulting velocities of any given load. The loading data will provide that info.
TEXASforLIFE
Ronin
I'm missing 2 pages from the new Sierra book, but in ssp it only list h4895.
Eddy Stone
Operator
IMR 4895 was the old standard powder for 30-06 in the Garand. It was easy on the much more fragile op-rod. Worked great in the 1917 Eddystone as well.
Scout308
Alpha
I’m new to M1A. Been loading for my Ruger 308 scout. Been very happy with Varget. Till now my bench was dedicated to the Ruger. Now I have a set of dies that will be exclusive the M1A Scout Squad. I also have two powder measures, one for Varget and other for H4895.
The fun continues
The fun continues
TEXASforLIFE
Ronin
Hopefully your basement is dry and static free?
Scout308
Alpha
It is. I run a dehumidifier down there. That and the furnace keeps things dry. Shops been down there seven years now
Keep all my hunting gear in that same room. It’s my safe place
