Dump that Eurotrash and buy a Savage 10ML-II. Proofed to 129,000psi by the factory and made with the same grade of steel as a CF rifle. You could shoot 300grains+ of T7 and not even come close to blowing it up. For that matter, I don't think that you'd get Knight or T/C to tell you exactly what they proof their barrels to either. I bet they don't want the general shooting public to know just how close they come to the max pressures with 150gr charges.

Look at your barrel and see if there are any proofing marks present... I'll bet that you won't get BPI to tell you what pressure they proof their guns to, if they do at all.

Some interesting reading on this topic:

http://www.chuckhawks.com/no_standards.htm

http://www.chuckhawks.com/unsafe_muzzleloaders.htm

Mike