Very interesting. My gut tells me if I tune the mags, it will solve the problem. Totally makes sense.
My plan is to polish the feed ramp, and tune the mags. I'll then manually run several rounds through it, without firing and test the setback to see if anything has changed. I'll do live fire on Sunday during a steel challenge.
And yes, this is factory Blazer 124 ammo.
Brand new springs and followers (grams) - I could try swapping them out, incase one is bad. I saw someone say polish the follower, do I use the same Flitz on the follower?
thank you everyone for your help