If I was testing hot 9mm loads, then a blowback action carbine would be my last choice. While many blowback action carbines seem rugged and heavy, I think their actions are actually less robust than modern service pistols, since virtually all 9mm pistols have locked breach actions.
With that said, I would not be too concerned about the Federal 9BPLE rounds. Large amounts of that ammo has been fired through a wide range of service pistols, and I have not heard or problems, or even excessive wear. I am not convinced that these +P+ rounds are significantly hotter than the stronger +P rounds.
Also, the +P+ marking is a mixed bag. It is very true that there is no standard for +P+, and there are some very hot loadings in 9mm cases for a variety of uses. So I do believe in using real caution with rounds marked +P+. But it is also true that the +P+ symbol is kind of like advertising in some cases. So I think some ammo is marked +P+ as a marketing gimick to charge extra for "super duper" ammo, where the rounds are barely over +P pressure, or maybe not even.