Best Powder for 7mm Rem Mag...?


May 5, 2012, 04:40 PM
I'm getting ready to make an order to start loading for my 7mm Rem Mag and I am trying to figure out the best powder that would give the best bang for the buck (pun intended).

Most my manuals have Retumbo for accuracy and that's kind of what I was looking at.

What's a good powder that I can use in several rifles but also works great in the 7mm Rem Mag?

Currently the only powder I have that I have used in rifles is H4895. Other powders on hand are: Unique, Titegroup and Autocomp.

Thanks in advance for any advice.

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May 5, 2012, 05:38 PM
The only powder I've ever used in my Rem 7mm mag has been IMR4350. 40yrs ago there was not a lot of options.

I don't get the best bang for the buck. Your not going to be shooting 1000's of these.

May 5, 2012, 05:52 PM
What he ^^^^^ said, IMR4350

May 5, 2012, 06:06 PM
I shoot only Retumo now. I have used and also like both H and IMR 4350, as well as IMR 4831, but ive switched mostly do to the added velocity. Accuracy has been about the same between all of them in my rifles and with me shooting.

May 5, 2012, 08:33 PM
My 35 year old 700 7 rem mag has digested more IMR 4350 than all other powders combined.

May 5, 2012, 10:44 PM
I used Re22 and IMR4381c for a few years.

Now I exclusively use H4350.

Lloyd Smale
May 6, 2012, 07:21 AM
i use mostly re19 and re22 and 4831sc.

May 6, 2012, 10:31 AM
I had always thought that either IMR or H 4831 was the best, but since have come to like IMR7828 in the several 7mags I've loaded for.

May 6, 2012, 11:37 AM
When I loaded and shot 7mm Remington Magnum I used Hodgdon-4831 which we purchswed in a 100 lb keg for $50. At that time it was a military surplus powder. I believe that Hodgdon now offers a short cut version which meters more uniformly.

May 6, 2012, 12:13 PM
Looks like I need to try that 62.5 gr. charge of IMR7828 and the accubonds. I tried IMR7828 before, but with different bullets and was not impressed.

My standard loading for the 7mm Mag is 60 to 61.5 gr. of IMR 4831 with 150 Ballistic tips which has shot well in 3 different rifles.

Next up is RL-22 which I am shooting with 160 to 175 gr. bullets (Nosler and Sierra) and gives me good accuracy.

I used and liked IMR-4350 with 130 to 150 gr. bullets and it gave good accuracy also.

May 6, 2012, 01:19 PM
Looks like I have several good ones to choose from. IMR7828, 4831 or 4350.

May 6, 2012, 01:33 PM
sit down and figure out what calibers you are loading then pick the best powder you can load all of the calibers you are using.then buy bulk,same lot,same pressure differential.less powder types means less mistakes.then all you have to worry about is grains.

May 6, 2012, 02:08 PM
True. Right now I just have the 7mm RM and .223, but have planned to get a 30-30, .243 and .270. :)

Maybe a .308 and .338 down the road. I love shooting rifles. Maybe a .50. :D

May 6, 2012, 03:20 PM
I use RL22 for 7 mag., but it seems a little too slow for cartridges like .270 win or 30-06. The latter two shoot very well with IMR-4350 and RL19 for me. It really depends on what velocity, and accuracy your trying to achieve. Regarding bang for the buck, that is not part of my reloading goal, only the best performng powders get to make into my empty cases.

May 6, 2012, 08:26 PM
I started with rl19, then to rl22. Now I use H4831. 64gr with a 162 amax and a chi 200 primer will impress you. I'm getting right at 2900fps and can shoot it all day long.

May 6, 2012, 08:32 PM
Apparently I'm odd man out When I'm done burning my Imr4831 hunting loads, Im switching to h1000 full time.
May 6, 2012, 10:08 PM
Last fall I started working on my 7mm loads. My goal was to load a 139 grain soft point bullet to around 7mm-08 velocity for deer hunting. I tried IMR7828, R22, and H4831sc powders. H4831sc was the most accurate on target and R22 was the most consistant as far as velocity. These were with WLRM primers. I am planning on trying regular LR primers to see what happens.

chuck plissken
May 6, 2012, 11:27 PM
I use 4831SC and maintain 100yrd 3/4moa. excellent powder next to RE22.

texas chase
May 7, 2012, 09:54 AM
Another vote for R19 and 4831.

May 7, 2012, 12:51 PM
H1000 is all I've ever used. I like it alot.

May 7, 2012, 01:39 PM
IMR 4831, 4350, 7828 have all given me MOA groups with bullets in the 160 and 175 weight range from my 1980 700BDL

May 7, 2012, 02:02 PM
My 7 Rem Mag likes IMR 7828 SSC

May 7, 2012, 08:14 PM
I don't know about the other powders mentioned, but if you try RL22 don't expect very good results with standard LR prmers. I tried standard LRP's a couple years ago and got blasted with hot particles, and accuracy and velocities were all over the place.

May 7, 2012, 11:48 PM
I'm another fan of IMR4350. My 700 BDL loves it. I also load my 264 WinMag with it. I use it at times for the 30-06 and 270. I haven't tried it yet but I have load data for it for my 30-30 and 303 Brit.

May 8, 2012, 12:26 PM
I use IMR4064, for both my 7mm mag & my 22-250, I may not get the very top velocity out of it but both rifles are very accurate with it. I shoot 150gr ballistic tip from the 7mm & 50gr ballistic tip from the 22-250

May 8, 2012, 04:22 PM
For 7mm RM I like:

Reloder 22
IMR 7828 SSC
Ramshot Magnum

Others I've tried that will also work:
Reloder 25
Hodgdon H4831SC
Reloader 19
Ramshot Hunter
IMR 4350

May 9, 2012, 02:13 PM
Well I think I have decided to try out the IMR4350 for the first powder in my 7mm. Thanks everyone for the replys. I will definitely be referring back to this thread in case I'm not happy with the powder I've chosen.

May 12, 2012, 08:18 AM
If you can find any of the discontinued H870, that powder was known for high velocity. Perhaps a bit dirty, but very fast. A friend of mine loads his 7mm mag from an older hornady load book, 1981 I think, with 180 grain bullet well over 3000 fps. He doesn't reload that brass twice as the primers fall out of the pocket. He has excellent accuracy and can see the bullet hit the target through the scope before the recoil moves his sight picture.

May 12, 2012, 11:27 AM
CAUTION: The following post includes loading data beyond currently published maximums for this cartridge. USE AT YOUR OWN RISK. Neither the writer, The High Road, nor the staff of THR assume any liability for any damage or injury resulting from use of this information.

My opinions on the problems with 7mmRemMag:
1) The cartridge should have been SAAMI registered at 71,000 psi, not 61,000 psi.
2) Published loads for the 7mmRM are mostly way below 61,000 psi.
3) The cartridge chamber should have been SAAMI registered at 0.215" headspace from breech face to the end of the belt, not 0.220", because all the brass is less than 0.215".

So what do I do with the 7mmRM?
1 &2) I hand load to 71,000 psi.
The book load for 162 gr H4350 may be 58 gr, but I am hunting with 67 gr.
3) I headspace the rifles I build for myself at 0.215".

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