CIP (European Law) pressure limit on the 7x57(.276) case, was and is 57,000PSI/49,000CUP. That is only 4,000PSI/3,000cup under the 7mm/08's 61,000PSI/52,000CUP,
however, that difference will pretty much make up for the larger case of the 7mm vs. the 7mm/08, thus max. vel. at their pressure limits should be about equal.
Norma is one of the Euro companies who appears to load to the CIP specs, of course.