7mm mag loads for H870 and AA8700

[Jimbeaux82]

Does anyone have good load data for either 7mm Rem Mag or 7mm Wea Mag using 150-160 gr bullets and H870 or AA8700 powder?

Thanks

Jimbeaux

 

[Guest]

I've got some, but it'll take me a little while to dig them up. Do you have either powder? Or are you working off some surplus milspec stuff? Either way, I'll get load data to you if I can later today.

 

[SJB358]

My all time favorite load is 79gr of H870, CCI250, WW case and a good one 160 grain bullet. It shot like banshees and was accurate in alot of other buddies rifles. I like H870. Scotty

 

[DrMike]

My current "go to" load for the 7 RM is built with H870 and 175 grain Partitions. The load give great accuracy and excellent velocities. I've used a little A8700, but I usually reserve my small supply for other overbore cartridges.

 

[Guy Miner]

Mike, that's what I used in my 7mm Rem mag for my Wyoming bull hunt years ago; H870 and the 175 Nosler Partition. The 175 Sierra actually shot a little better, but not much, and I wanted the terminal performance of the long & lethal 175 Partition. It worked just fine.

H870 is real tough to find anymore.

 

[DrMike]

Guy,

My last three pounds are reserved for loading for my 7 RM. It has served me well for many years, and I will use up the last of my powder. I also have a little over three pounds of A8700 that I use for some larger capacity cartridges.

 

[Guest]

Okay, here's what I have in the way of data for H870 or AA8700 for the 7mmRemMag:

From Nosler #5
160gr Partition
H870
Start charge 75.5gr - 2982fps
Mid charge 77.5gr - 3047fps
Max charge 79.5gr - 3112fps

175gr Partition
AA8700
Start charge 69.5gr - 2661fps
Mid charge 71.5gr - 2729fps
Max charge 73.5gr - 2797fps

From Hodgdon 2005
162gr Hornady Spitzer Boat-Tail
H870
Max charge 80.0gr - 2883fps

175gr Partition
H870
Max charge 77.0gr - 2782fps

From Accurate 2005
Speer 120gr SP
AA8700
Start charge 71.1gr - 2743fps
Max charge 79.0gr - 2982fps

Sierra 140gr SBT
Start charge 72.0gr - 2555fps
Max charge 80.0gr - 2777fps

Sierra 150gr SBT
Start charge 71.1gr - 2715fps
Max charge 79.0gr - 2951fps

Nosler 160gr Partition
Start charge 71.1gr - 2698fps
Max charge 79.0gr - 2933fps

Nosler 175gr Partition
Start charge 67.5gr - 2534fps
Max charge 75.0gr - 2754fps

From Lee's Modern Reloading 2nd Ed.
115gr Jacketed bullet
AA8700
Start charge 71.0gr - 2563fps
Max charge 79.0gr - 2913fps

120gr Jacketed bullet
AA8700
Start charge 71.0gr - 2624fps
Max charge 79.0gr - 2982fps

130gr Jacketed bullet
AA8700
Start charge 71.0gr - 2658fps
Max charge 79.0gr - 3020fps

140gr Jacketed bullet
AA8700
Start charge 72.0gr - 2444fps
Max charge 80.0gr - 2777fps

150gr Jacketed bullet
H870
Start charge 80.0gr - 2960fps
Max charge 80.0gr - 2960fps

AA8700
Start charge 71.1gr - 2597fps
Max charge 79.0gr - 2951fps

160gr Jacketed Bullet
AA8700
Start charge 71.1gr - 2581fps
Max charge 79.0gr - 2933fps

H870
Start charge 80.0gr - 2914fps
Max charge 80.0gr - 2914fps

162gr Jacketed bullet
H870
Start charge 80.0gr - 2883fps
Max charge 80.0gr - 2883fps

168gr Jacketed bullet
H870
Start charge 71.5gr - 2771fps
Max charge 77.0gr - 2963fps

AA8700
Start charge 70.2gr - 2520fps
Max charge 78.0gr - 2864fps

170gr Jacketed bullet
H870
Start charge 80.0gr - 2828fps
Max charge 80.0gr - 2828fps

175gr Jacketed bullet
H870
Start charge 76.1gr - 2756fps
Max charge 77.0gr - 2782fps

AA8700
Start charge 67.5gr - 2424fps
Max charge 75.0gr - 2754fps

195gr Barnes bullet
AA8700
Start charge 69.3gr - 2383fps
Max charge 77.0gr - 2708fps

I hope this is helpful. I used to have more sources, but somehow I've misplaced a couple of pamphlets. This is pretty much all the data out there right now, anyway. At least to the best of my knowledge. Good luck with it!

 

[Bruce Mc]

I've got five pounds of H870 and it is really, really, really, old. I think its from WWII. It still looks and smells like it should. I tried it with some 160s a while ago and go some good initial results but it sure is temperature sensative to the tune of over 200fps from the 90s of summer to the 70s of fall. I'll likely give it a whirl with some of the loads ya'll posted for the 175 Partition. I got a couple hundred of 'em coming from the pro shop.

 

[Jimbeaux82]

Actually I am considering buying some milsurp WC857 or WC872, and both reference the H870 and AA8700. So I am trying to decide if they are good applications for 7 Mags , both Rem and Wby. I would like to get 3100 fps out of 150 gr bullets and close to that , 3050 fps , with 160 gr bullets.

If they are temp sensative, I probably will not go to the trouble and just pay extra for the more modern non-temp sensative powders.

 

[gerry]

This is probably the place to ask this but is US 869 the replacement for H 870? Tried US 869 in my 264 WM but it wasn't nearly as accurate as H 4831 SC or Retumbo.

 

[DrMike]

Gerry,

I don't believe you can consider the US869 as a replacement for H870, just another slow powder. It has application in some of the high-capacity cartridges, but I've found in most cases so far that other powders give me greater accuracy.

 

[FOTIS]

I used 80 gr for the 160 gr with both powders.

 

[Jimbeaux82]

I used 80 gr for the 160 gr with both powders.

Any idea on the velocities achieved?

 

[SJB358]

I got around 3075 with 79grs in my M70 with the 160's. Scotty

 

[Guest]

I've used AA8700 in my 270Wby with very good results accuracy-wise. I've not found it to be terribly temperature sensitive, exhibiting about 75-100fps variance from 85-90deg in the summer to freezing or slightly below in the winter over my chronograph. I consistently get 2950-3000fps from a mild 150gr load, that consistently prints under half MOA for three shots, and sometimes under caliber, around .25MOA. That's from a Mark V Synthetic with a sporter barrel. I wouldn't hesitate to try it in a 7mmRemMag if I had one in the safe. In fact, I've considered the milsurp stuff for when my 8700 runs out.

 

[FOTIS]

I used 80 gr for the 160 gr with both powders.

Any idea on the velocities achieved?

In my 7 mm rem mags always 2900-3050 fps pending on rifle

 

[baltz526]

The 175gr Partition, 7mm rem mag load i have shot is 77gr and it was showing 2860fps out of a 26" If i had a bunch of it i would shoot it up. But re22 works a bit better for me.

 

[gcp]

Great data on this thread, thank you!

 

[FOTIS]

George welcome to the forum buddy. We can always use another gun nutty Greek around here.

Great place to be

 

[gcp]

Thank you for the warm welcome Foti, I think I'll like it here.

As a quick intro, I've been reloading since the early 80s, for both pistols and rifles, in all sorts of calibers. I love milserps (Swiss, Swedes, Germans, Brazilians....) so I reload for everything I shoot, other than 22LR and 22mag.

I was thinking to buy a couple of 8 pound jugs of WC872 from Wideners and was researching the particulars of the powder and potential use of proven recipes for 7.5x55, 8mm, 7mm Rem Mag, and 308.