Which powder to get more speed in 7 Mag

[remingtonman_25_06]

H1000 or Retumbo gives good velocity and accuracy in a 7 RM, plus they're very consistent and temp stable. Those are my favorite powders for magnums, for the above reasons. A lot of powders will give good velocity, but are either temp sensitive, or not very consistent lot to lot.

 

[270elk]

I have had very good luck with RL22 and 26 both provide excellent velocity and accuracy in my rifles. There are urban-legends about RL22 having some temperature velocity swings but finding empirical evidence is difficult. My load in a 300WM has shown about a 55FPS swing in velocity from a 25 degree day to a 95 degree day. Not enough to change anything for hunting purposes.This is my rifle and my magneto speed chronograph; not a scientific or industry report. RL 26 is another beast. It provide amazing velocity and accuracy in my 270s and 300WM, but availability has been the limiting factor.

 

[ReloadKy]

Thanks for all of the suggestions.

 

[archeratlrg]

My Nosler Loading manual and others all show velocities in excess of 3,000 fps using both H4350 and H-4831. Both requiring over 60 gr. of powder. What loads are you using? I would rather hit "exactly" where I pointed, than gain a little more velocity.

I know this is an older post, but im using 68.5-69gr of H4831sc behind the 160gr partitions/accubonds for 3100 out of my old stainless barreled 700 Remington. Faint electoral marks, but not enough to worry about. 6-8 loading on my brass so thats good too. 70.5-71 grains of H4831sc will get me over 3300fps with 150gr bullets and bughole groups.

 

[preacher]

I have been using RS Grand in ADG brass under the 175 NPT. I get a nice 1" group going 3050fps average. I have also tried RS Magnum behind the Sierra 175 SBT and get the same accuracy but at 2985. I would try either with the 150...just saying.

 

[steve99]

In my Rem 700CDL 7mmRem Mag, when using 160gn Nosler Accubonds, RL25 produces the best velocity at 3000fps.

 

[Joec7651]

In my Rem 700CDL 7mmRem Mag, when using 160gn Nosler Accubonds, RL25 produces the best velocity at 3000fps.

One of my 7 mm RM’s likes RL25 as well. 175gr ELD-X’s group very nicely at a 3003 fps average without leaning on it hard. It’s a 26” X-Caliber barrel and is a very nice shooter.

 

[RL338]

I feed my 7mm RM RL-26 pixy dust under 160s.

 

[Salchi Papa]

I’m shooting the same rifle as the OP and I’ve used H4831 with great accuracy and was able to squeeze 2950 out of it but it shoots fireballs in darker parts of the day. I’ve switched to R22 and run it around the same speed 2930 without the fireball. I’ve had great speeds with imr7828 not ssc and got over 3000 but have not had the same accuracy as R22. Fortunately I have a few pounds of R22 still; according to nosler load data imr4831 and imr4350 give the fastest fps but I haven’t used them in 7mag however imr4831 gets my 270win wiggling out real good from a Rem700 from the 60’s