I recently had a holosun 507 mounted and I have completely run out of elevation adjustment
I haven't tried another load yet to see if that was the issue I was testing viper ammo 3 in 8.5/9 stacked
Out of Retay 22 inch barrel shooting a pattern master code black I am getting great pattern results but
shooting 6-8 inches low at 25 yards and I have no more elevation anyone got any suggestions or should I just shim it
I have used pieces of a soda can as shims before after running out of adjustment
Check out ADE Advanced Optics shim. It worked for me.