264 Win Mag and 7mm Rem Mag Ramshot LRT data (and Retumbo).

[Keystone7mm]

Agreed. Thanks! I've been wanting to give LRT a go in my 7mm Rem Mag. This is very helpful!

 

[ARlife4me]

Agreed. Thanks! I've been wanting to give LRT a go in my 7mm Rem Mag. This is very helpful!

Nosler doesn't list lrt for 7rm, but does for 7rum 185gr. Ramshot might have data for the rm?

 

[Keystone7mm]

Nosler doesn't list lrt for 7rm, but does for 7rum 185gr. Ramshot might have data for the rm?

The problem I have, and I'm sure others have found the same issue, is that load data for the 7RM is limited to lighter bullets because the factory barrels have a slow twist rate. Finding load data for the heavy bullets is tough. Berger has been awesome about helping me out, but they still didn't have LRT listed.

 

[Mike D Texas]

The problem I have, and I'm sure others have found the same issue, is that load data for the 7RM is limited to lighter bullets because the factory barrels have a slow twist rate. Finding load data for the heavy bullets is tough. Berger has been awesome about helping me out, but they still didn't have LRT listed.

This is where loading software like Quickload is invaluable. Load books are outdated.

 

[Calvin45]

Got my hands on a pound of Ramshot LRT finally, and 9lbs of Unicorn Tears (Retumbo), so went out today to get a rough idea of charge weights for my 264 Win Mag and 7 Rem Mag. Figured the LRT data might be helpful for others, as I didn't find much in the online reloading manuals. No accuracy info, as I was only shooting one shot per load to get a velocity graph.

Temp was ~44° F, data collected on a LabRadar.

264 Win Mag. 24", 1:8, 5R, X-Caliber (Savage). 2X Fired R-P brass (Weight ~230 gr, Volume ~86 gr H2O). COAL = 3.340", ~0.02" off lands.
Ramshot LRT, 147 ELD-M
View attachment 351594

Retumbo, 147 ELD-M
View attachment 351595


7mm Rem Mag. 26", 1:8, 5R, X-Caliber (Savage). 2X Fired ADG brass (Weight ~245 gr, Volume ~84 gr H2O). COAL = 3.335", ~0.02" off lands.
Ramshot LRT
View attachment 351598

Retumbo, 175 ELD-X
View attachment 351599

Some comments...

I saw no signs of pressure up to the max tested, so there's a bit more room to go, though I doubt I'll push it any further. I'm very happy with velocities for both powders, and want to leave a little room for temperature increases during the summer.

I pressured out in both cartridges at lower velocities with both H1000 and RL26.

Though Quickload and most reloading manuals indicate I would be well over 100% case fill with LRT, that doesn't seem to be the case. The max loads above still had some "rattle", though they were definitely right up near the neck/shoulder junction.

Hope this helps someone else thinking about trying LRT in a 264 or 7 mag.

Ive entertained thoughts of a fast twist 257 bee for the 130+ class bullets. Sounds like this might be a good performer.

 

[M1A1ABRAMS]

The problem I have, and I'm sure others have found the same issue, is that load data for the 7RM is limited to lighter bullets because the factory barrels have a slow twist rate. Finding load data for the heavy bullets is tough. Berger has been awesome about helping me out, but they still didn't have LRT listed.

Sorry no LRT but thought maybe this might help someone. These loads are using different barrels. I just took pictures of different pages within the manual. In case someone may be interested in purchasing one.
Edit, the manual is called "One Book/ One Caliber". I have seen them for sale. Pretty cheap. I'm not sure if they are the older version as mine. Or if they have possibly updated some of the info.

 

[M1A1ABRAMS]

Few more from One book one. Caliber.

 

[std7mag]

The problem I have, and I'm sure others have found the same issue, is that load data for the 7RM is limited to lighter bullets because the factory barrels have a slow twist rate. Finding load data for the heavy bullets is tough. Berger has been awesome about helping me out, but they still didn't have LRT listed.

The typical twist rate for 7mm being 1:9 - 1:9.5 let's you shoot up to the 180gr bullets.
Even the Weatherbys 1:10 let's you shoot up to the 175gr bullets.

 

[Keystone7mm]

The typical twist rate for 7mm being 1:9 - 1:9.5 let's you shoot up to the 180gr bullets.
Even the Weatherbys 1:10 let's you shoot up to the 175gr bullets.

Agreed. I could not get them to stabilize in my remingt

 

[Keystone7mm]

Sorry about that. I couldn't get anything larger that 168's to stabilize out of my Remington 700. I want to be able to shoot the 190+ bullets out of my new build. Went with the 1-7.5" twist given my problems with my 1-9.25" factory barrel.