Earlier in this thread, we discussed all of this.

Since none of us has as you ask, "mapped out the real limitations of this gun", most shooters will adhere to the maker's maximum notes, ie: 32,000psi (pezio) CIP, which is 4,000PSI higher than SAAMI recommendations which are suggestions, not law. In Europe, CIP listings are law as I understand the situation.

The current standards are CIP 32,000PSI and SAAMI 28,000PSI.
In CUP - ie; copper crusher units of pressure, the CIP is listed as 29,000 CIP and SAAMI as 28,000 CUP, which is identical to SAAMI's PSI numbers.

Marlin says their guns are OK to 43,000. Hornady loads them thusly for the Marlins - Marlins have been tested by them, to 70,000psi with extraction normal, no adverse pressure signs. THAT is NOT suggested loading data. Never exceed a manual's load for any given rifle. I though it interesting they found it necessary or even a good idea to mention this 'test'. Their premise was that current brass is as strong as any other modern brass, that is all, I'm sure, and that their rifles possess a degree of safety.

As far as over-reacting to someone's loads for the Baikals, lets not be too hasty unless we know what they are doing. Tom, as he stated, plans to keep his loads at or below 28,000psi, even though Baikals are listed to 32,000psi. If he went to that level, he'd easily beat 2,000fps with 400's, but that will not be much fun for him in this relatively light rifle. A Hornady RN at 350gr. at 1,600fps to 1,800fps will be more than enough for his 'game'.