Why did changing buffers change my POI?

[Darryle]

Dwell time, if your rifle was leaving battery to quickly, then you are experiencing lower velocities/pressures affecting POI. I generally see improved function, lower felt recoil and improved function of the rifle while reducing wear and tear using heavier buffers.

FTR, suppressed or not, I never use an adjustable gas block, I tune using heavier buffers, I start with a H3 and usually go up from there. I have some that are over 8oz.

I have never been and never will be a fan of restricting the one thing your rifle needs to function. My opinion, worthless to most, is that an adjustable gas block is a half hearted attempt at getting a rifle to function properly.

YMMV