H4350 roughly same as IMR4350?

[janobles14]

cant seem to find my normal .30-06 powder (H4350) in stock around here right now and need to work up a few loads. one of the local stores, however, has IMR4350 on sale for a dang good price. i was wondering if these are pretty much interchangable? would my 58 grain load of H4350 with a 165 gr bullet fly the same?

i also have TONS of Varget around. anyone know of a load that might mimick the H4350 load? i just didnt think one would due to burning speeds. but thought i would ask!

thanks!

 

[MEHavey]

I asked QL to give me the results of 56.5gr (case full) of both Hodgdon IMR 4350 under a middle-of-the-road 168 SMK. It surprised me by saying they were only a coupla hundred psi different for essntially identical velocities.

YMMV....

VARGET's a whole different story. You need to DROP at least 10% from any previous 4350 loading to "minic" the slower 4350.

 

[janobles14]

i did the same in QL and was kinda shocked as well. i know that the two 4350's have almost identical relative burn rates but ive learned to go by real world info more and more! im keeping my fingers crossed that someone has done this or one of the gurus will know for sure.

yeah i figured i was poop outta luck on the varget. i just dont want to resight my scope and the 58 gr. of H4350 is a tack driver for me.

 

[Visionz45]

I recently went to my shooting supplies store and found everything hodgdon and IMR have minus both 4350's which are my 165 go-to powders for '06. I bought a few pounds of H414 and have kinda wondered what QL would perdict with WIN cases CCI 250's and 165 Accubonds, 57.5 gr powder charge(25" bbl/.30-06). I will stock up on both powders after I return from NW Ontario. I shot the last of my pet loads on a 100-400 yd range and figured I could find one of the two, guess the ban on "ball" powder has been lifted.

 

[MEHavey]

57.5gr H414 in a 68.2gr(H20) case behind a 165 Accubond hits 57,000psi/2,930+fps (in a 60,000psi cartridge). ....kinda pushin'/past the engineering limits IMHO.

That said, H414 is a superb powder for the`06. And for only a loss of 50fps you can drop a grain to 56.5gr and operate at a slightly less insane 54,000psi. (Hodgdon says 50,000CUP)
http://data.hodgdon.com/cartridge_load.asp

Personally, I'd drop another half grain to 56.0 and call it a day for (very) little additional loss in velocity -- and a much more civilized 52,000psi/2,830fps

NOTE: My lawyer says you never read this, and I was never here.
Take care......

 

[Visionz45]

.30-06 is rated to 50000cup/ 60000psi. 57000 psi would be sane for me. Thanks for the data! Hornady's book listed a max of 58.2/3 behinds a similar bullet. I tend to have less problem with BT's and Ab's that I do with SST's.

 

[USSR]

Not much difference between the IMR and H versions of 4350. However, the same cannot be said of 4831, with IMR4831 being somewhat faster than H4831.

Don

 

[W.E.G.]

See http://www.reloadersnest.com/burnrates.asp for burn-rate comparisons.

 

[ArchAngelCD]

I prefer H4350 over IMR4350 but I have used both. With a 168gr MatchKing I load 58.0gr H4350 but drop the charge to 57.0gr when using IMR4350. I've found IMR4350 to be a little bulkier so it will fill the case a bit more. If I recall correctly I get just about the same velocities from those 2 loads. (I think)

 

[243winxb]

H4350 & imr4350

H4350 & IMR4350 are not the same, but close in burning rate. Start low on the powder charge and work up as always.