Hotshot: Moonshine Shack

[Bentu]

Combat shotgun is at 18, pump is at 8.

I'm not sure but I think Moonshine is pump, if that's the case that's your problem. You need to get you pump shotty level up.
When you do the raiders literally go flying.

Edit. If you want to level up any weapons quickly, go to the Hulker at San Quentin, do the mission until the Hulker appears and then start shooting him until Ego says "he's not going to stop" his health bar will be really low then.
Then using one of the rocket launcher there you need to kill yourself but make sure the Hulker isn't near you or you may kill him to and you DON'T want to do that.
When you're on the floor push extract.
This will make you re spawn and his heath will reset to full.
Now just keep repeating until you've leveled up that weapon as much as you like.

Yiu can also use this method to remaster your weapons quickly.

[Sevrin]

I think the ammo scavenger perk helped me a lot with this one, as I recall.

[Strychnine]

I'm not sure but I think Moonshine is pump, if that's the case that's your problem. You need to get you pump shotty level up.
When you do the raiders literally go flying.

Edit. If you want to level up any weapons quickly, go to the Hulker at San Quentin, do the mission until the Hulker appears and then start shooting him until Ego says "he's not going to stop" his health bar will be really low then.
Then using one of the rocket launcher there you need to kill yourself but make sure the Hulker isn't near you or you may kill him to and you DON'T want to do that.
When you're on the floor push extract.
This will make you re spawn and his heath will reset to full.
Now just keep repeating until you've leveled up that weapon as much as you like.

Yiu can also use this method to remaster your weapons quickly.

I'm off to grind it out!

[Xaat Xuun]

I did it before the patch before that patch and the patch before that, in all I've done it 4 times, my 5th characters shotty level isn't high enough yet but when it is I'll do it.
.

OKay, so you haven't done it recently .. it has changed since you last did it
nothing wrong with your advice, but the Hotshot is messed up right now. That's why I asked if you have done MoonShine Shack since latest patch

[Xaat Xuun]

tested the fix on PTS, with my 5k and 1300.
it's fixed and all good, certainly will be happy when that fix hit's live.

also wanted to thank those that mentioned using Assassin Cache and Scavenger perk, my 5k could had stayed there for ever, and ammo rarely dropped below 240 after reaching 250. and a good shield

my 1300, only had Scavenger perk lvl 2, that was still good enough to gaining ammo, and staying ahead enough to get Silver, and pump shotgun is only skill 8. I also removed any of the perks for the power I had, since you cannot use your power, and added more defense, mainly because my 1300 does not have a good Shield (capacity is too low at that level)