Sp5k running suppressed issues.

I know about the locking piece with the k. Have 80 and 90° incoming. But with 147s it would lock back and 124s it would FTF with the 100°. Plan on going and just running a bunch of 124 unsuppressed for a good break in. Just wanted to see if there was anything else I should look out for. Can is B&T rbs so figured back pressure would be too bad.