It takes me all of 15s to do heavy ammo glitch (using no land beyond rapid fire trick). This allows me to insta-kill swordbearer and ogres with several Gjallahorn shots, and is useful if no heavy drops or if my synth is on cooldown. Can I do it without? Sure! But it makes it so much easier and is a great insurance policy if swordbearer hides or if other people are out of rockets. However, I understand the frustration when people take 2min to empty their ammo. By now, everyone should have several "no land beyond",so people should have those equipped when doing heavy ammo glitch.