I tried some different ammo the other day that my daughter gave me, wasn't going good had FTF & FTE problems. I'm not posting this to bash ammo brands, posting because I have figured out wy it was happening.

I can run Remington 115g without any issues, she gave me Blazer 115g to try, had issues with those.
Below is what I come across.

Remington- over all length 1.110, diameter of casing .386
Blazer- over all length 1.155, diameter of casing .389

Conclusion=
Ammo with a over all length at 1.110 works perfect
Ammo with a 1.155 over all length interferes with the feed. I noticed that the angle of the bullet going up the feed rap makes the nose of the bullet hit the inside top of the barrel making it interfere with the feeding process.

I'm going to test some more ammo soon and post measurements and testing results.

Any body else having these issues, I hope this helps you.