I recently came into a few pounds of H-570 powder. I cant seem to find much about it other then its a slow burning powder. What are some different calibers that this would work in? Any information would help.

Thanks,

Greg

Let's see now. If I remember correctly.

The only cartridges I've heard of it being used in are very overbore case capacities. Like the 30-416IMP, 30-378Wby, 338-378Wby,7mm-378Wby, and the 50bmg and it's variants.

Not to say that it wouldn't work well in say a 7mmRUM or the like.

264 Win mag, 75 grains produced the highest velocity recordrd with a 140 gr bullet, speer #8 3313 fps from 26" bbl. Think of it as extruded H870.

quote:

Think of it as extruded H870.

The two powders are about as close in buring rate as any two non-identical powders can be.

My 25/06 load for H870 is 64.0 which is a case so full you have to tap repeatedly to get the powder below the mouth to seat a 117 spbt but she shoots into 3/8" at 100yds.

I " Borrowed " this from another posting site !.

He's been around near as long as I have and we both still have all our fingers and thumbs .

Just remember to watch for pressure signs . It is a 20mm powder , I still use h870 in my magnums

as I've got a barrel of it left !.


what caliber are you wanting to use it in ? it is a 20 mm powder closest to imr 7013. it will work best in large cases.us 869 starting data should work.i doubt you will have pressure problems with this powder unless you underload it.S.E.E. can happen.

Last edited on 19 November 2007 04:13 PM by wheezengeezer

From Speer #7 1966 copy I find loads for 25-06 6.5X55 264 Win mag 270 Win 270 Wby 7 Rem mag 308 Norma 300 H&H 30-06 Ackley 338 Win mag 300 Wby If you need load info I will help you.

Thanks for the responses. It looks like the powder should work in a few calibers I have. If I tried to use the H-870 data, should I start a few grains lower? Wasilla, if you get a chance could you send me the loads for 7mm Rem. mag and 338 Win. mag. Thanks again.

Greg

Loads for Hodgdon H-570 powder
7 Rem mag 130 Speer spitzer Magnum primers for all loads
79.0 Gr 3024 Fps
81.0 Gr 3137 Fps
83.0 Gr 3191Fps Max
145 Speer
79.0 Gr 2962 Fps
81.0 Gr 3066 Fps
83.0 Gr 3156 Fps Max
160 Speer
79.0 Gr 2962 Fps
81.0 Gr 3026 Fps
83.0 Gr 3113 Fps Max
175 speer semi spitzer
72.0 Gr 2867 Fps
74.0 Gr 2774 Fps
76.0 Gr 2867 Fps

Only Showing 338 Win Mag loads for the 275 Gr semi spitzer bullet. Does not call for magnum primer.
79.0 Gr 2390 Fps
82.0 Gr 2499 Fps
85.0 Gr 2929 Fps

I wound up with a brand new - old can of this from a horse trade deal so went on a research mission to find every load I could find for the stuff. I think I am going to load a bunch of 270 Win for a wedding present for my nephew with it. They are both hunters and ammo /components is almost impossible to get up here now since the Obomanation kicked in. I double checked what I have written --it is straight out of the book.
Rod in Wasilla