The p30l and p30 in 9 needs to be broken in to be reliable since the recoil springs are really tight. After about 200 to 500 rounds it will become 100% reliable with everything. Also it doesn't say in the manual to not use +p, only that it will accelerate wear. This is because the recoil springs are built to go 20k rounds minimum.
P30 in 40 doesn't seem to require he same break in period due to higher power.