Long Range 7mm Rem Mag

[shawnff]

What powder out of H-1000, Retumbo and 8133 should I start with for the best ES. I'm trying 162 grain ELDx out of a new Ridgeline from Christensen Arms.

[lostdog99]

If I may . .. There are a ton of variables that contribute to ES and SD. Bullet jacket consistency, "bullet jump " (the distance of the bullets bearing surface to the throat), case neck tension, the list goes on.
I would keep my eye on neck tension first.
But to answer your question we like H-1000 for many reasons. Low SD's are one, temp stability is the biggest.

[428cj]

I had good luck with Reload 22 in my 300 Win Mag.

[stomp442]

68.5gr of H1000 is a pet load that has worked in multiple 7 Mags I have done with the 162-168 class bullets. 70.0gr of Retumbo has also been a load that has worked well. I have found that if they don't like the H1000 load the Retumbo load will usually work. Every barrel and rifle has a different personality so you just have to see what it likes. Good luck and of course start low and work up to those charges, they are near max loads in most reloading manuals.

[outdoorplay]

I've had good luck with IMR 4831.