Other powder than H1000 for 7 LRM

[Rick Richard]

Anyone have any success with other powder than H1000 for 7 LRM? Also, please share your load recipe and performance data.

Thanks in advance for any replies.

Rick

 

[gillettehunter]

I don't have that caliber, but I'd look at Retumbo. Most rifles that use H-1000 will do well with a few more grains of Retumbo. It burns a little slower.

 

[Pa Grizz]

I don't have that caliber, but I'd look at Retumbo. Most rifles that use H-1000 will do well with a few more grains of Retumbo. It burns a little slower.

I second the Retumbo. I use it in my 7mm rem mag

 

[firstcoueswas80]

With out looking at my notes, I think,70-71 grains of Retumbo was getting me 3050 with the 180 hybrid.

 

[AZShooter]

I have the slightly larger case, a 7mm/375 without the shoulder moved back like the LRM. I tried H-1000, US 869, Retumbo and RL-33 with 168 Berger hybrids. Didn't bother with the 180s because the rem 7 mag takeoff I rechambered is a 1 in 9.25 twist. The rifle really came alive with higher velocities and good accuracy with RL-33. With a 26" barrel and 86 gr of RL-33 I am getting 3268 fps.

Obviously your LRM will use less RL-33. I would start with a charge weight a few grains below the top load for Retumbo and work up from there. This approach has worked for a 6mm-284, 257 Weatherby, 300 RUM as well. Alliant may have made RL-33 but their load data is very limited.

 

[JeffVN]

Try Retumbo, RL-25 and RL-33. There is a new IMR powder but I can't remember the number that burns nearly identical to H1000.

JeffVN

 

[JakeGraves]

Ramshot Magnum might be worth a shot. My LRM shoots lights out with 71.6 of H1000 and 180 Hybrids so I am not messing with it anymore. I am getting just a touch of smoke on the necks so I am already on the slow end with H1000.

 

[mbeebout]

h1000 68.2 with 162 amax toughing the lands also I use 70 gr retumbo and 168 berger vld toughing lands both loads work great in my 7mmgun)

 

[RustyRick]

4831 always bested in my old 7mmRM. Starting a new one today.