I purchased a new G43 and installed ameriglo night sights and ghost edge connector. I have 4 mags all the number 1 mags. Two I left stock OEM6 rounders and one I put on taran tactical +2 base plate (with new spring provided) and the other strike industries EMP G43 +2 second gen base plate (with a spare brand new taran tactical spring).
With FMJ 115gr winchester white boxes everything performed flawlessly. G-43 shot great, sights were great and ghost edge worked well. I tried out Federal HST 124gr +P, Federal HST 147gr, Federal HST 147 +P and Speer 124 +P gold dots. They all performed flawlessly out of the OEM 6 rounders. The Federal HST 147 +P consistently shot the tighter groups while all were acceptable groups.
BUT in either of the +2 mag extensions I had consistent failure to feed with ALL the different self defense loads. Most failure to feeds were on the last 7th or 8th round.
So I replaced the stronger springs with the factory 6 round spring and +2 base pads and I had greater failures. Some were at the second round, some the fourth and some last seven or eighth. Just to make sure I used my other OEM 6 rounders and again all self defense loads functioned flawlessly.
For me I could only get the FMJ to perform with the +2 base pads. ALL of the self defense loads had failure to feed issues with the +2 base pads with either stock spring or taran tactical supplied spring.