7mm Rem Mag powder

[hawk-i]

another vote for RL 22

 

[Retriever]

Using IMR4831 for the last 35 years with no reason change.

 

[dan belisle]

In my son's 70 classic 26" barrel neither 4831's were anything to write home about so I went with Ken Waters Pet loads manual's recommendation as second most accurate load tested.Over the years I saved a bunch of time and components following his lead.He knew his stuff.

Quoted for truth. I miss Ken's writings. - dan

 

[vmax204]

I would have bet money that 4350 would be too fast for the 7 Mag but with accuracy like you're getting who cares if you're losing a few fps!

I've had very good success with IMR 4350 as well. Velocity doesn't always equal accuracy

 

[BlackRam]

My reloading mentor has always said that Magpro was THE powder for the 7mm Rem Mag. Not sure about it's temp sensitivity.
I had such good luck and accuracy in my 7mm Rem Mag with Federal's Premium 165gr SGK ammo, when I had it, that I never reloaded for it.

 

[todbartell]

Magpro in my 280 with 165gr Sierra :

-2c 2800 fps
-16c 2825 fps
-19c 2807 fps

I haven't shot that load in warm temps. I'd expect an increase in speed/pressure, at least above 20c

 

[Eagleye]

IMR 7828 was originally developed with the 7mm Rem Mag in mind. It often performs the best
with 160-175 grain bullets.

That being said, many other powders work well in the big 7. I like IMR 4831 with the 150-154
grain bullets, and Norma MRP has been a winner for me with 160 grainers. I had a smoking load
with the 175 Partition and Ramshot Magnum. Shot sub-moa consistently out to 400 meters.

I would be willing to bet that Reloder 25 and 26 would work well also. Dave.

 

[TangoKilo]

110%
Great accuracy and lots of speed with the RL25

Reloader 25 first then Rel 22

 

[Lead hammer]

Thanks fellas.

 

[wheeler]

IMR 4831 with hot loads for my 7mm produce great velocity & accuracy.... like others have said.. No reason to even try other powders. When I was researching which powder to try when I first got into reloading, the common denominator was IMR4831, & I can see why now!

 

[Ranger Dave]

I'm also a big fan of IMR 4831 in the 7mm Rem Mag. Its great in the 300 Win Mag as well.

 

[CreamySmooth]

RL22. Goes boom good.