[Badlander]

45-70 Who is loading them? I am planning to use RL7. got any loads?

[Sunray]

There's one 525 grain load on Reloader's Nest. Not with RL7 though. H4895. The guy says he's getting 1.75" 3 shot groups at 100 out of a Marlin 1895.
Alliant only goes to 400 grain bullets. You could contact them and ask if they have any RL7 data. http://www.alliantpowder.com/questions/default.aspx

[Ridgerunner665]

Alliant likely has never tested bullets that heavy in a Marlin...many folks still think that bullets that heavy can't be used in Marlin.

I like the looks of Marshall's load with H4895...over 1800 fps with a 22" barreled Marlin, and under 35,000 psi.

I haven't tried that load yet...I shoot mostly the 405 LFN/GC bullets, but I am going to try it.

[Sunray]

"...Alliant likely has never tested bullets that heavy..." Or in anything else. They seem to test with mostly Speers. The guy on Reloader's Nest said the load was 'hard kicking' too. Imagine a 525 grain bullet out of a 7/7.5 pound rifle being hard kicking. snicker.

[Badlander]

I like the looks of the H4895 too. But i have A good supply of RL7 and wont be loading A lot of these. I think with 50 525s I can kill all the T Rex in my Area!!
I have emailed Beartooth and Alliant for info. I wanted to load some up this weekend but I want to be sure of the loads.