My most accurate and consistant loads for my 7MM Remington Mag have been with IMR 4350. The first powder I tried in the gun. I've tried several others a few have given just a little more MV but none have matched the 4350 accuracy.
I tried Re25 with 160 Sierras and didn't like the result. I have used H870 with the 160 Sierras for years in an older 7 mm Rem and it drives tacks. 870 should beat H4350 for velocity with the 160. I have also had very good luck with IMR7828 and Speer GS 160.
Posts: 180 | Location: lakewood, co | Registered: 26 March 2006
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Posts: 10226 | Location: Temple City CA | Registered: 29 April 2003
I like as high a vel. as possible & good accuracy when I look for a powder in any given cartridge. Starting at H4831sc & going to H1000. I have had great luck w/ RL22 & like IMR7828 even better. Sub moa w/ 160gr NP @ 3100fps. You may get good accuracy w/ one of the 4350 but give up as much as 150fps. Might as well have a .280.
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Posts: 7752 | Location: kalif.,usa | Registered: 08 March 2001
My best loads have been with V-V N160 a powder with a burning rate much like 4350. 66.0 grains with Nosler's 160 partition gives an honest 3050FPS and has stopped everything I pointed the gun at.
It has been my experience that in the hvy bullets 160-175 the slower powders are better. RL 22 is my favorite but Retumbo is also a great powder.Each rifle will have its favorite powder and bullet combo.Also do a search and you'll find tons of loads here.Good Luck
Posts: 1111 | Location: Edmond,OK | Registered: 14 March 2001
Mine does better with IMR7828 & RL22 than Retumbo or H1000. Go figure. Each rifle can definately be different. I use a lot of H4831sc, and it works well in the 7mm RM also. Nate
The best I found for my 7mag was IMR 4831, using 62.5 grains with the 160gr partition, which is the only bullet I use for this.
And not stretching the truth, it will hold 1/2" and under groups at 100yds every time I take it to the range. That's after a trigger job, and a synthetic stock to replace factory.
One of the most perfect loads I have is 80 grains of H-870 behind the 160 Nosler Partition fired by a Fed 215 primer. I get sub moa groups and 3100fps. Great all around load. Doug
Posts: 1332 | Location: Western NC | Registered: 08 January 2005
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Posts: 4601 | Location: Pennsylvania | Registered: 21 March 2005
Man, I may not be as sophisticated as a lot of these good people but you just got to try the ecconomically accurate data 86 powder. In fact get a bunch of it. Eventually it'll go the route of 2200. roger
Old age is a high price to pay for maturity!!! Some never pay and some pay and never reap the reward. Wisdom comes with age! Sometimes age comes alone..
Posts: 10226 | Location: Temple City CA | Registered: 29 April 2003
Originally posted by Magnum Hunter1: One of the most perfect loads I have is 80 grains of H-870 behind the 160 Nosler Partition fired by a Fed 215 primer. I get sub moa groups and 3100fps. Great all around load. Doug
Darn, you use the same load I use. I only get 3050 out of a 24". Very accurate. Pain in the rear because it's a compresed load.
Posts: 194 | Location: Alaska | Registered: 08 April 2004
Accurate data 86. 
Man, I may not be as sophisticated as a lot of these good people but you just got to try the ecconomically accurate data 86 powder. In fact get a bunch of it. Eventually it'll go the route of 2200. 
roger
