My agency was the one who worked with Federal to develop BPLE. We carried it for several years and I investigated several shootings where it was used. It performed very well. No complaints. I'd use it again today even tho it is "old technology". It can be found at pretty reasonable prices too.
As far as the +P+ hurting your 5906. We were issued the 5904 which is the same as the 5906 but with an alloy frame and blued slide. One of our range guys got tired of hearing others say the +P+ will ruin a gun so he decided to see how many rds his 5904 would take before it was destroyed. He documented every +P+ rd he fired. He replaced the barrel at 50,000 rds after the orginal rifling began to show it was getting shot out and smooth pretty smooth. He also replaced the springs. When he retired he had documented 80,000 +P+ rds. He bought that gun when he retired. When I last saw him 2 yrs ago he was still shooting that same gun. Knowing how much he shoots he had to have fired over 100,000 by that time.
If you can afford to shoot 80,000 rds thru any gun then figure the cost. You bought 200 rds for $65. 80,000 rds would cost you $26,000. Now figure how long it will take you to shoot those 80,000 rds. If you shoot 100 rds a week, every week without fail, 52 weeks a yr, it will take you over 15 yrs of shooting.
Will your particular 5906 go 80,000 to 100,000 rds? Who knows. Might not last 20,000 rds, might go well over 100,000. Our range officer didn't know when he started out with his was an off the rack, nothing special 5904.