Borderlands – How to do zero’s bore glitch to the bunker

The bonus from piercing is cumulative. Presumably there is some upper limit to the bonus, but I don't know what it is.

The idea of Zer0's "tw0 fang" skill is to improve Zer0's designed game play, the way he was supposed to be played. Zer0 is fantastic as melee, sniping and pistols above all when containing under-barrel blades so this skill is to benefit single shot weapons over all others. in short, there is NO effect on burst fire weapons that can help you, the only possibility is that the first two shots of a burst would be fired in a quicker succession, some players may find that helpful to speed up the moment as I am sure we have all had those moments in Borderlands where you wish you could of got that one extra shot on the enemy in second wind.

As for the the relic, again this has the same effect and although some player may find it unworthy of use, I would personally state that no harm can come from this feature, only positives ... unless you are extremely O.C.D and demand the firing sequence of your gun to be fired perfectly in sync with one-another. as for stacking up the effect, Yes. This will improve the statistics already based on Zer0 and will give you grater chance of achieving those extra shots!

Hope this helps, enjoy your massacre!