H&K USP 9mm problem

[HKROB]

I have a problem with my uspf 9mm about every 150rds I get a FTE with WWB ammo I have shot 200rds of other ammo with no problems.I am thinking about replacing the extractor & recoil spring.This is an older usp with an unknown round count.I also have a uspf .45 and eats everything I feed it.

[sammy]

When the pistol cycles normally, where do the extracted shells land?

[HKROB]

When the pistol cycles normally, where do the extracted shells land?

off to my right not sure how far I shoot at an indoor range and the booth is kinda small.

[2ma2]

FWIW I have a sig X5 that ftes wwb all the time, I even returned it for warranty work. It works fine with Federal AE!! I measured several brands of 9mm at the extractor lip of the case and to my surprise they were not all the same, WWB has the smallest dimension of the cases I measured. IMHO if an extractor is less than perfect it will show up first with wwbs.