Total Issues: 10
Each issue will increase the critical damage of ballistic by 5% for a maximum of 50%.
Lasers & Hunting: Acceptable Overkill
Fort Hagen: You can find this issue on a table in the kitchen to the SE of the building's interior.
Avoid those Pesky Gun Laws!
There should be an NPC named Barney Rook besieged by mirelurks. You should be able to get the key to the basement from him after helping him with a quest. However, there will be an unfortunate glitch where you'll find two dead mirelurks in front of his house and he's nowhere to be found. This will prevent you from getting inside the basement where you should find a copy of Guns and Bullets inside.
Take Aim, Army Style
South Boston Military Checkpoint: On the table near the door you'll find this issue.
Street Guns of Detroit
You'll find this issue in the second floor, in the archive room to the south, in the center table in the middle of the room.
The Moon: A Communist Doomsday Device?
Quincy Ruins: Make your way to the overpass where you'll find the green steamer trunk. The magazine is found on the table beside the terminal where the gunner leader is staying.
Bear Proofing Your Campsite:...
Cambridge Police Station: This is found in the chief's room near the entrance but will only appear once the Brotherhood of Steel's reinforcements arrive (via their airship). Unlock the Expert safe in the corner office to get this issue. That safe can also be opened from the Advanced terminal nearby.
Little Guns For Little Ladies
Fraternal Post 115: This is found in the middle of the room, on the stand in the stage.
Guide to hunting commies!
Ticonderoga: This is found in the penthouse level, on a table beside a terminal in a small office room to the NW.
The Future of Hunting?
BADTFL Regional Office: Found on the chief's table, in the Novice-locked chief's room in the office area.
Plasma - The Weapon of Tomorrow
The Castle: Found on the table beside the radio tower in the middle of the Castle's yard.