Would it be ridiculous to shoot Buffalo Bores out of a 141? Not such how hot those loads are compared to whats been talked about here already.
I’ve heard several people say to stick to JFN ammo in those rifles. And to stay away from hard cast and LVR ammo if you care about the longevity of your rifle.
Trying to find a 141. In turn I am trying to figure out what to shoot out of it.
If it is over Saami pressure for a 35 Remington, I certainly would not. And given the speeds I seem to remember being touted by BB ammo, I don't see how it could not be over pressure.
Stick to standard factory loadings which by necessity keep the pressures down at Saami due to rifles like the 141 you mentioned, and much older like 14's and model 8's still commonly being used.
Given the price of 35 Remington ammo, if you can come up with some Speer 180 FN or Sierra & Hornady 200 gr RN, I'd buy them up. You can find brass, you can get the other components, but in 35 caliber, bullets is often the issue right now. Or if you happen to run across some good priced factory ammo buy it up.