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H870 and The Seven Mag #15738079 02/02/21
Joined: Jan 2009 Posts: 1,857 C chesterwy OP Campfire Regular
OP chesterwy Campfire Regular C Joined: Jan 2009 Posts: 1,857	I have a new to me 7 mag coming my way in the next week, and recently was given about ten pounds of old H870. From what I’ve read is was considered to be a peas and carrots powder for heavier bullets in the 7 mag back when it was available. I’m not able to find much data online, and my loading manuals don’t go back that far. So does anyone here have experience with this combo? I plan on running 160 grain accubonds, if I can find some.

GB1

Re: H870 and The Seven Mag chesterwy #15738374 02/02/21
Joined: Sep 2011 Posts: 2,198 Alb. N.M. B Bella1 Campfire Regular
Bella1 Campfire Regular B Joined: Sep 2011 Posts: 2,198 Alb. N.M.	Wow , some body loves you! I’m not kidding . Fantastic powder. BUT YOU CANT HAVE MY 160 Accubonds😂 Keep your head on the stock,wood on wood

Re: H870 and The Seven Mag chesterwy #15738403 02/02/21
Joined: Feb 2001 Posts: 7,948 Eagle River Alaska K kk alaska Campfire Outfitter
kk alaska Campfire Outfitter K Joined: Feb 2001 Posts: 7,948 Eagle River Alaska	Great powder for the 7MM Mag ,dirty burning, great accuracy and velocity with 160-175 one of my loads shows 3 @ .94", 160 gr Speer 2990 FPS 24" barrel H870 max load kk alaska Alaska 7 months of winter then 5 months of tourists

Re: H870 and The Seven Mag chesterwy #15739012 02/03/21
Joined: May 2011 Posts: 890 3 32_20fan Campfire Regular
32_20fan Campfire Regular 3 Joined: May 2011 Posts: 890	I need to check my older Nosler reloading manuals but I believe they had some H870 load data in there (maybe for the 175s but still useful info). Edit to add: Nosler #5 has 79.5 grains of H870 for the 160 grain projectiles (max load at near 3100 fps). I have a 160 Accubond load that is running at 3000 fps out of a 26" Win 70 and well behaved between 20F to 70F. H870 certainly can't claim the benefits of today's more refined/advanced powders but the 7 RM is a good incinerator to burn some up with the heavier class bullets. Last edited by 32_20fan; 02/03/21.

Re: H870 and The Seven Mag chesterwy #15739065 02/03/21
Joined: May 2014 Posts: 10,393 NE South Dakota Bugger Campfire Outfitter
Bugger Campfire Outfitter Joined: May 2014 Posts: 10,393 NE South Dakota	I prefer classic. Semper Fi I used to run with the hare. Now I'm envious of the tortoise and I do my own stunts but rarely intentionally

IC B2

Re: H870 and The Seven Mag chesterwy #15739075 02/03/21
Joined: May 2014 Posts: 10,393 NE South Dakota Bugger Campfire Outfitter
Bugger Campfire Outfitter Joined: May 2014 Posts: 10,393 NE South Dakota	I prefer classic. Semper Fi I used to run with the hare. Now I'm envious of the tortoise and I do my own stunts but rarely intentionally

Re: H870 and The Seven Mag chesterwy #15739085 02/03/21
Joined: May 2014 Posts: 10,393 NE South Dakota Bugger Campfire Outfitter
Bugger Campfire Outfitter Joined: May 2014 Posts: 10,393 NE South Dakota	I prefer classic. Semper Fi I used to run with the hare. Now I'm envious of the tortoise and I do my own stunts but rarely intentionally

Re: H870 and The Seven Mag chesterwy #15740000 02/03/21
Joined: Sep 2004 Posts: 8,127 S.E. Alaska MuskegMan Campfire Outfitter
MuskegMan Campfire Outfitter Joined: Sep 2004 Posts: 8,127 S.E. Alaska	My older horny manual shows 79.1 max (3,000 fps) for the 154 gr SP and 78.8 max (3,000 fps) with the 162 gr BTHP with H870. Looking for my Hodgdon #3 manual. H870 is pretty close to US869 and Accurate 8700

Re: H870 and The Seven Mag chesterwy #15740241 02/03/21
Joined: May 2014 Posts: 10,393 NE South Dakota Bugger Campfire Outfitter
Bugger Campfire Outfitter Joined: May 2014 Posts: 10,393 NE South Dakota	From Hodgdon manual 37 I prefer classic. Semper Fi I used to run with the hare. Now I'm envious of the tortoise and I do my own stunts but rarely intentionally

Re: H870 and The Seven Mag chesterwy #15740244 02/03/21
Joined: May 2014 Posts: 10,393 NE South Dakota Bugger Campfire Outfitter
Bugger Campfire Outfitter Joined: May 2014 Posts: 10,393 NE South Dakota	I prefer classic. Semper Fi I used to run with the hare. Now I'm envious of the tortoise and I do my own stunts but rarely intentionally

IC B3

Re: H870 and The Seven Mag chesterwy #15740280 02/03/21
Joined: May 2014 Posts: 10,393 NE South Dakota Bugger Campfire Outfitter
Bugger Campfire Outfitter Joined: May 2014 Posts: 10,393 NE South Dakota	January 1981 Handloader article by Ken Waters I prefer classic. Semper Fi I used to run with the hare. Now I'm envious of the tortoise and I do my own stunts but rarely intentionally

Re: H870 and The Seven Mag chesterwy #15740333 02/03/21
Joined: Jan 2009 Posts: 1,857 C chesterwy OP Campfire Regular
OP chesterwy Campfire Regular C Joined: Jan 2009 Posts: 1,857	Thank you Bugger. That's very beneficial.

Re: H870 and The Seven Mag chesterwy #15781199 02/13/21
Joined: Jun 2012 Posts: 1,313 Colorado D Dustylongshot Campfire Regular
Dustylongshot Campfire Regular D Joined: Jun 2012 Posts: 1,313 Colorado	Back in the 70's when I used a 7 mag. Remington for all my big game hunting I used 79 grains of H870 behind the then new Speer Grand Slam bullet.

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