I ask only for players who have 4bars of connection to answer this because I know that med-high lag/latency affects bullet speed animation and bullet hit detection.
1. Is there any significant visual and hit detection (i.e the amount of delay in which the bullet hits and the hit is detected) difference in the bullet of a callahan (normal shot) when its ASI is at none, high and at max?
2. Will the attack animation of a callahan (the gun itself), in conjunction with shield cancelling, end faster when it is at ASI high/max when compared to a stock callahan? Is there a significant visual difference?
3. Can a blitz (lvl10) with dmg vs undead vh 1 charge shot kill a vana's slag guard with full health (i.e. recently spawned) when in a full team (4)? [Not equipped with any gunner armor or trinkets]
ggkthxbye
I'm not a Callahan user, so can't give an answer to #1 with certainty, but:
1/ Not much. Callahan hits are as close to instant as you get. You notice it more with alchemers where you need to lead shots (in PvP, anyways; in CW they land as aimed)
EDIT: re-read the question after Mohander posted. No, ASI doesn't affect bullet speed at all, on any guns, only the animation in which you fire the bullet.
2/ Shield cancelling is easier, and faster when the weapon has more ASI.
3/ No. I'm pretty sure to onehit the Slags in a 4man you need max damage and need (almost) every bullet to land. I've got max damage on my Blitz and fail to onehit them sometimes, I presume by simply standing too far back and missing a few bullets.