LUGER AMMO

MY STOEGER LUGER LITERALLY CHOKES ON ANY 115 GRAIN 9MM AMMO. i HAVE EJECTION PROBLEMS-FEED PROBLEMS. MY LUGER WILL NOT EAT THE CHEAPER 115 GRAIN 9MM STUFF NO MATTER HOW CLEAN MY GUN IS. I FIND WITH 124 OR EVEN 147 GRAIN I GET GOOD FEED (ALMOST) PERFECT RELIABILITY AND BETTER ACCURACY AT ALL DISTANCES. SHARE YOUR THOUGHTS BUT DONT TELL ME TO MIX HEAVIER AND LIGHT AMMO AS THE LUGER RELIABLY CHOKES UPON CHAMBERING THE 115 GRAIN STUFF. HISTORICALLY WASNT THE LUGER 9MM 124 GRAIN ANYWAY?