Powder for 7 mm Remington mag

Wendyj · April 16, 2015, 06:17 PM

Got dies and trimmer for husbands 7 mag today. Any recommendations on a very accurate powder. Looks like IMR 4831 and reloader 20 is what most people post along with several Hodgdon powders. Not looking for maximum velocity or super long range. Wanting super accuracy. Thinking of starting with 139 grain Hornady SST. Hes never shot anything but Sierra BTSP out of the Tikka hunter he used to own but the Remington doesn't care much for this factory ammo. Lot of powders to choose from but would like your inputs. Max range probably won't exceed 300 yards.

jwrowland77 · April 16, 2015, 06:23 PM

For anything under 150gr I run IMR 4350 and anything over 150gr, I run 7828. Both those powders have produced great accuracy in my rifles.

histed · April 16, 2015, 07:09 PM

I normally shot 140 gr. in my Savage 110. It really liked RL-22 (and so did I). Once I settled on a load, I didn't really play with the others much

std7mag · April 16, 2015, 07:25 PM

For my 139gr. SST's I'm using either Reloder 22, or Reloder 25.
Hogdon H414 has worked very well for the accuracy dept.

Savage 111, 24" barrel, composite stock, cheap a$$ bi-pod, Redfield Revenge 4-12x42 scope with varmint accu-reticle.

Oh, BTW, I load my SST's 0.010" off of the lands.

Clark · April 16, 2015, 10:59 PM

CAUTION: The following post includes loading data beyond or not covered by currently published maximums for this cartridge. USE AT YOUR OWN RISK. Neither the writer, The Firing Line, nor the staff of TFL assume any liability for any damage or injury resulting from use of this information.

This is 11 gr more than the Hodgdon published max, but I find it 2 gr below the threshold of extractor groove growth. I have used it in a factory Browning 1885 in 2014 and in a Rem 700 that I built with a shilen barrel in 2013.

I shot (3) groups with it in 2014 with the Browning:
1) 1.0" 3 shot group at 100 yards = 1.0 moa
2) 3.6" 3 shot group at 450 yards = 0.8 moa
3) 7.2" 3 shot group at 550 yards = 1.3 moa

70 gr H4350 140 gr Nos Bal tip Moly 3.34" chronographs 3400 fps
Quickload predicts 3389 fps 75 kpsi

2014

2013

Those are animals I shot, but I also have a pic of a big elk bull shot by a friend of a friend with a 7mmRM in 2014 with teh 139 gr SST

hooligan1 · April 17, 2015, 05:21 AM

Im with jwrowland77, my rifle is a model 70,26"1-9.5" , freefloated and pillarbedded, and recoil lug bedded, it loves IMR 7828 and 160 grn Accubonds, as well as Berger VLD's in 168.
Clark my threshold for pain stops at around 60,k psi... Wow 75kpsi?. How does that feel?

jmr40 · April 17, 2015, 05:48 AM

I loaded for 7 mag briefly. I found 4831 to be accurate, but slow. RL 25 was the only powder I found that offered good accuracy and velocity that would beat my 30-06 with similar bullet weights. And it wasn't much faster.

AllenJ · April 17, 2015, 08:42 AM

In my son's 7mm RM we've tried IMR4350, IMR4831, R17, R22, and IMR7828SSC. All have given us around MOA accuracy at some point in load development using 150 grain to 160 grain bullets.

TimSr · April 17, 2015, 08:50 AM

I like H870 for 175gr bullets, and IMR4350 and RE17 for 150gr from my Model 70.

Will-j · April 17, 2015, 06:26 PM

WENDY; Try IMR 4831/R-P Brass/9 1/2M primer/Sierra 140 BTSP or FB.
One load I worked up in'76 for my RUGER 77 used 66.4 gr. with the above components and .020" off the lands. Three-shot cloverleafs still go .275"@ 100 yds. w/2 min. between shots with either bullet.. Adjust load to your rifle, but it should work in yours.
GOOD LUCK.
WILL.

homesick · April 17, 2015, 06:46 PM

I run 7828 sc with 150 Noslers as does my son both of our rifles shoot 1 " moa

Wendyj · April 17, 2015, 07:49 PM

IMR 4831 was all I could find. Printed Nosler load for 140 gr bt and loaded 62 grains showing there most accurate load. Bullet seems awful long out of brass. Nosler says oal with this bullet at 3.290. Factory core lokt measures out at 3.175. Is that natural for bullet difference? Trying to follow specs as close as possible. Powder was measured on linear and digital scale. Didn't seem to fill cartridge as much as my 308 loads. Trying to be safe.

Wendyj · April 17, 2015, 07:51 PM

IMR 4831 was all I could find. Printed Nosler load for 140 gr bt and loaded 62 grains showing there most accurate load. Bullet seems awful long out of brass. Nosler says oal with this bullet at 3.290. Factory core lokt measures out at 3.175. Is that natural for bullet difference? Trying to follow specs as close as possible. Powder was measured on linear and digital scale. Didn't seem to fill cartridge as much as my 308 loads. Trying to be safe. Bolt seems to close good with no resistance.

jwrowland77 · April 17, 2015, 07:58 PM

Yes. Each bullet has it own length, each rifles different, each testing is done with their own length, each bullet has a different spot where the ogive is.

I generally run mine .02" off the lands a 139gr Hornady BTSP. OAL is 3.300"

Wendyj · April 17, 2015, 08:23 PM

I've sent once fired case out of 7 mag and 308 to Hornady to drill and tap. Still waiting on Hornady oal guage. I've tried the crimped bullet. Soot sharpie. Guess I don't have the feel for it.

Wendyj · April 18, 2015, 03:51 PM

IMR 4831 62 grains of powder under 140 gr nosler bt. Remington brass Remington 91/2 magnum primer. Only loaded 10 but husband is really happy with groups. Under a dime at 100 yards.

hooligan1 · April 19, 2015, 05:04 PM

If your husband shot all ten under a dime at 100, I'd say thats about adecent load as ever was concocted. Congrats!

jwrowland77 · April 19, 2015, 05:06 PM

Yeah, I'd say chronograph that load and put it in the book.

William T. Watts · April 19, 2015, 06:54 PM

Remington's original factory loading used a bulk lot of IMR7828, I've used this powder (canister lot) in my 7mm mag and was quite pleased with the results. Nosler 150gr Partitions or their old SP bullet preformed flawlessly with very good accuracy! William

Wendyj · April 19, 2015, 08:33 PM

First 3 trial shots under a dime. Used three more to get zero at 2.5 high. Let barrel cool 20 minutes. Put 3 more dime size at his zero point. He wasn't much into reloading. Can't get him off the scales and press now. Now he's been all over web trying to find velocity and energy at 100 and 300.

hooligan1 · April 20, 2015, 05:27 AM

If the velocity is important, he needs to shoot over a decent chronograph...published velocities are hard to match with your rifle at your range...

Colorado Redneck · April 21, 2015, 09:33 PM

http://www.jbmballistics.com/cgi-bin/jbmtraj-5.1.cgi

This ballistics calculator is a nice tool. Input the altitude etc and you can get a fairly accurate idea what your load will do if you know the velocity.

Sure Shot Mc Gee · April 21, 2015, 09:54 PM

Some G.I surplus (50 cal pulled) powder still available in the market place. WC-857 or WC-860 would work well for a 7-Mag loadings. Cheaper too than any brand name canister powder is. By about 1/2 the price.

CowTowner · April 23, 2015, 10:11 AM

Quote:

Some G.I surplus (50 cal pulled) powder still available in the market place. WC-857 or WC-860 would work well for a 7-Mag loadings. Cheaper too than any brand name canister powder is. By about 1/2 the price.

Yep.

http://www.gibrass.com/gunpowder.html

Machineguntony · April 23, 2015, 03:14 PM

Whatever powder you decide to use, you are a lucky lucky guy. Magnum powder is THE most available powder right now.

April 16, 2015, 06:17 PM	#1
Wendyj Senior Member Join Date: April 3, 2015 Location: North Georgia Posts: 1,372	Powder for 7 mm Remington mag Got dies and trimmer for husbands 7 mag today. Any recommendations on a very accurate powder. Looks like IMR 4831 and reloader 20 is what most people post along with several Hodgdon powders. Not looking for maximum velocity or super long range. Wanting super accuracy. Thinking of starting with 139 grain Hornady SST. Hes never shot anything but Sierra BTSP out of the Tikka hunter he used to own but the Remington doesn't care much for this factory ammo. Lot of powders to choose from but would like your inputs. Max range probably won't exceed 300 yards.

April 16, 2015, 07:09 PM	#3
histed Senior Member Join Date: April 9, 2013 Location: Central PA Posts: 254	I normally shot 140 gr. in my Savage 110. It really liked RL-22 (and so did I). Once I settled on a load, I didn't really play with the others much __________________ You Have enemies? Good. That means that you've stood up for something in your life. --Winston Churchill The right to buy weapons is the right to be free. -- A.E. Van Vogt

April 16, 2015, 10:59 PM	#5
Clark Senior Member Join Date: December 4, 1999 Location: WA, the ever blue state Posts: 4,678	CAUTION: The following post includes loading data beyond or not covered by currently published maximums for this cartridge. USE AT YOUR OWN RISK. Neither the writer, The Firing Line, nor the staff of TFL assume any liability for any damage or injury resulting from use of this information. This is 11 gr more than the Hodgdon published max, but I find it 2 gr below the threshold of extractor groove growth. I have used it in a factory Browning 1885 in 2014 and in a Rem 700 that I built with a shilen barrel in 2013. I shot (3) groups with it in 2014 with the Browning: 1) 1.0" 3 shot group at 100 yards = 1.0 moa 2) 3.6" 3 shot group at 450 yards = 0.8 moa 3) 7.2" 3 shot group at 550 yards = 1.3 moa 70 gr H4350 140 gr Nos Bal tip Moly 3.34" chronographs 3400 fps Quickload predicts 3389 fps 75 kpsi 2014 2014 2013 Those are animals I shot, but I also have a pic of a big elk bull shot by a friend of a friend with a 7mmRM in 2014 with teh 139 gr SST __________________ The word 'forum" does not mean "not criticizing books." "Ad hominem fallacy" is not the same as point by point criticism of books. If you bought the book, and believe it all, it may FEEL like an ad hominem attack, but you might strive to accept other points of view may exist. Are we a nation of competing ideas, or a nation of forced conformity of thought?

April 17, 2015, 05:21 AM	#6
hooligan1 Senior Member Join Date: July 18, 2010 Location: Independence Missouri Posts: 4,585	Im with jwrowland77, my rifle is a model 70,26"1-9.5" , freefloated and pillarbedded, and recoil lug bedded, it loves IMR 7828 and 160 grn Accubonds, as well as Berger VLD's in 168. Clark my threshold for pain stops at around 60,k psi... Wow 75kpsi?. How does that feel? __________________ Keep your Axe sharp and your powder dry.

April 17, 2015, 06:26 PM	#10
Will-j Senior Member Join Date: December 16, 2014 Location: SW Ga. Near Ft. Benning Posts: 251	7 REM. MAG Loads. WENDY; Try IMR 4831/R-P Brass/9 1/2M primer/Sierra 140 BTSP or FB. One load I worked up in'76 for my RUGER 77 used 66.4 gr. with the above components and .020" off the lands. Three-shot cloverleafs still go .275"@ 100 yds. w/2 min. between shots with either bullet.. Adjust load to your rifle, but it should work in yours. GOOD LUCK. WILL.

April 16, 2015, 06:23 PM	#2
jwrowland77 Senior Member Join Date: March 23, 2012 Location: Conway, Arkansas Posts: 1,398	For anything under 150gr I run IMR 4350 and anything over 150gr, I run 7828. Both those powders have produced great accuracy in my rifles.

April 16, 2015, 07:25 PM	#4
std7mag Senior Member Join Date: June 23, 2013 Location: Central Taxylvania.. Posts: 3,609	For my 139gr. SST's I'm using either Reloder 22, or Reloder 25. Hogdon H414 has worked very well for the accuracy dept. Savage 111, 24" barrel, composite stock, cheap a$$ bi-pod, Redfield Revenge 4-12x42 scope with varmint accu-reticle. Oh, BTW, I load my SST's 0.010" off of the lands.

April 17, 2015, 05:48 AM	#7
jmr40 Senior Member Join Date: June 15, 2008 Location: Georgia Posts: 10,805	I loaded for 7 mag briefly. I found 4831 to be accurate, but slow. RL 25 was the only powder I found that offered good accuracy and velocity that would beat my 30-06 with similar bullet weights. And it wasn't much faster.

April 17, 2015, 08:42 AM	#8
AllenJ Senior Member Join Date: December 11, 2009 Location: Northern California Posts: 1,766	In my son's 7mm RM we've tried IMR4350, IMR4831, R17, R22, and IMR7828SSC. All have given us around MOA accuracy at some point in load development using 150 grain to 160 grain bullets.

April 17, 2015, 08:50 AM	#9
TimSr Senior Member Join Date: March 8, 2013 Location: Rittman, Ohio Posts: 2,074	I like H870 for 175gr bullets, and IMR4350 and RE17 for 150gr from my Model 70.

April 17, 2015, 06:46 PM	#11
homesick Senior Member Join Date: February 11, 2011 Location: Central Florida Posts: 378	I run 7828 sc with 150 Noslers as does my son both of our rifles shoot 1 " moa

April 17, 2015, 07:49 PM	#12
Wendyj Senior Member Join Date: April 3, 2015 Location: North Georgia Posts: 1,372	IMR 4831 was all I could find. Printed Nosler load for 140 gr bt and loaded 62 grains showing there most accurate load. Bullet seems awful long out of brass. Nosler says oal with this bullet at 3.290. Factory core lokt measures out at 3.175. Is that natural for bullet difference? Trying to follow specs as close as possible. Powder was measured on linear and digital scale. Didn't seem to fill cartridge as much as my 308 loads. Trying to be safe.

April 17, 2015, 07:51 PM	#13
Wendyj Senior Member Join Date: April 3, 2015 Location: North Georgia Posts: 1,372	IMR 4831 was all I could find. Printed Nosler load for 140 gr bt and loaded 62 grains showing there most accurate load. Bullet seems awful long out of brass. Nosler says oal with this bullet at 3.290. Factory core lokt measures out at 3.175. Is that natural for bullet difference? Trying to follow specs as close as possible. Powder was measured on linear and digital scale. Didn't seem to fill cartridge as much as my 308 loads. Trying to be safe. Bolt seems to close good with no resistance.

April 17, 2015, 07:58 PM	#14
jwrowland77 Senior Member Join Date: March 23, 2012 Location: Conway, Arkansas Posts: 1,398	Powder for 7 mm Remington mag Yes. Each bullet has it own length, each rifles different, each testing is done with their own length, each bullet has a different spot where the ogive is. I generally run mine .02" off the lands a 139gr Hornady BTSP. OAL is 3.300"

April 17, 2015, 08:23 PM	#15
Wendyj Senior Member Join Date: April 3, 2015 Location: North Georgia Posts: 1,372	I've sent once fired case out of 7 mag and 308 to Hornady to drill and tap. Still waiting on Hornady oal guage. I've tried the crimped bullet. Soot sharpie. Guess I don't have the feel for it.

April 18, 2015, 03:51 PM	#16
Wendyj Senior Member Join Date: April 3, 2015 Location: North Georgia Posts: 1,372	IMR 4831 62 grains of powder under 140 gr nosler bt. Remington brass Remington 91/2 magnum primer. Only loaded 10 but husband is really happy with groups. Under a dime at 100 yards. Last edited by Wendyj; April 18, 2015 at 03:56 PM.

April 19, 2015, 05:04 PM	#17
hooligan1 Senior Member Join Date: July 18, 2010 Location: Independence Missouri Posts: 4,585	If your husband shot all ten under a dime at 100, I'd say thats about adecent load as ever was concocted. Congrats! __________________ Keep your Axe sharp and your powder dry.

April 19, 2015, 05:06 PM	#18
jwrowland77 Senior Member Join Date: March 23, 2012 Location: Conway, Arkansas Posts: 1,398	Yeah, I'd say chronograph that load and put it in the book.

April 19, 2015, 06:54 PM	#19
William T. Watts Senior Member Join Date: January 20, 2010 Location: Central Arkansas Posts: 1,074	Remington's original factory loading used a bulk lot of IMR7828, I've used this powder (canister lot) in my 7mm mag and was quite pleased with the results. Nosler 150gr Partitions or their old SP bullet preformed flawlessly with very good accuracy! William

April 19, 2015, 08:33 PM	#20
Wendyj Senior Member Join Date: April 3, 2015 Location: North Georgia Posts: 1,372	First 3 trial shots under a dime. Used three more to get zero at 2.5 high. Let barrel cool 20 minutes. Put 3 more dime size at his zero point. He wasn't much into reloading. Can't get him off the scales and press now. Now he's been all over web trying to find velocity and energy at 100 and 300.

April 20, 2015, 05:27 AM	#21
hooligan1 Senior Member Join Date: July 18, 2010 Location: Independence Missouri Posts: 4,585	If the velocity is important, he needs to shoot over a decent chronograph...published velocities are hard to match with your rifle at your range... __________________ Keep your Axe sharp and your powder dry.

April 21, 2015, 09:33 PM	#22
Colorado Redneck Senior Member Join Date: January 6, 2008 Location: Northeast Colorado Posts: 1,993	http://www.jbmballistics.com/cgi-bin/jbmtraj-5.1.cgi This ballistics calculator is a nice tool. Input the altitude etc and you can get a fairly accurate idea what your load will do if you know the velocity.

April 21, 2015, 09:54 PM	#23
Sure Shot Mc Gee Senior Member Join Date: January 2, 2012 Location: Minnesota Posts: 3,876	Some G.I surplus (50 cal pulled) powder still available in the market place. WC-857 or WC-860 would work well for a 7-Mag loadings. Cheaper too than any brand name canister powder is. By about 1/2 the price.

April 23, 2015, 03:14 PM	#25
Machineguntony Senior Member Join Date: June 22, 2013 Posts: 1,277	Whatever powder you decide to use, you are a lucky lucky guy. Magnum powder is THE most available powder right now. __________________ Sent from Motorola DynaTac 8000x

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