CM... I gotta respect that. Thanks for the advice given thus far. If you are curious about that particular rifle, and about the Marlin Ballard characteristics and differences in Cast and Forged frames they cover it briefly here: http://www.assra.com/cgi-bin/yabb/Ya...=1340046856/30
The picture you are looking at is a cast reciever, as identified by the cavity under the threads.
One of the main rubs with Marlin Ballard guys is those who ignore the warnings given them about the number of lines that are stamped on the receivers, two vs three, wherein one indicates cast and the other indicates forged. The cast receivers are recommended by many for 'no larger than 22 caliber', even those originally made for larger rim-fires.
It's not a warning unlike yours... given by well respected black powder shooters to those who are entertaining smokeless. On that account the only thing I can offer to set myself apart from those ignoring the "cast receiver warning" is that I'm relying on pressure graphs and testing. According to that data, the loads I'm shooting pose less risk in both spikes and top-end pressure than even BP. To show I'm not looking for an argument I'll add that I know respected Marlin Ballard experts who shoot nothing but light smokeless while I know perhaps more who would never shoot Smokeless.
I'm not looking to compound my mistake in not realizing there was a PP section dedicated to smokeless. I appreciate both your cautions and convictions.
Lead pot, Twenty five feet... wow. That'd shiver my timbers. I am curious though, are you saying you'd never consider smokeless in a Shiloh because of pressures? I knew Shiloh made rifles specifically for Black Powder but I always thought it was a liability thing for them 'and for other modern reproduction folks' to protect them from those who hot rod smokeless.