busman;
Try Warne scope mounts, I hear that are some of the strongest made.
Even Leupold recommends them. They told me to contact them because they did not make a base and scope mount for a Marlin 1894FG in 41mag.
I think you can get them through Midsouth Shooters Supply and Midway USA. But you can contact them at
www.warnescopemounts.com or call them at (503)-657-5590. They are really helpful.
By the way what barrel length did you get on that 41mag?
Keep us posted on how it shoots.
Dennis