piercing builds are better i made a build that rather bad and tested it with this one my trashy build beat it out by like 20 dmg

★5 MR Pierce build SKILLS FIXED (2)
Artillery 2
Recoil Down 2
Steadiness 2 (0 without Talisman Decoration)
Focus 1
Quick Sheathe 1
Tremor Resistance 1
Wirebug Whisperer 1
Spiribird's Call 1

★5 MR Pierce build SKILLS FIXED (1)

Critical Eye 7 (5 without Talisman)
Attack Boost 4
Maximum Might 3
Spare shot 3
Pierce Up 3
Reload Speed 3
Handicraft 2
Razor Sharp 2

★5 MR Pierce build GEAR FIXED

Nirvana+- Thrift 2
Male Utsushi Mask H- QuickL 1
Damascus Mail X- Artillery 2, QuickL 1
Barioth Vambraces X- Artillery 2, QuickL 1
Golm Faulds- Pierce Jewel 3, Expert Jewel 2
Ingot Greaves X- Absorber Jewel 1x2
Divine Talisman (CritEye2)- Sniper Jewel +4

★5 Master Rank Pierce build still VERY inaccurate.

If male, use Utsushi Hidden Mask H, replace Critical Eye Talisman with a level 4 deco slot, Remove one Thrift Jewel as there is one too many. You can use the level 3 deco slot for either Pierce up lvl 3 or Capacity 1

The ★5 Master Rank - Piercing Heavy Bowgun Build needs a serious reevaluation on what'll fit in what gear.

Yeah the headpiece only allows for a LVL2 gem slot

You can’t put capacity 3 on the head piece