I imagine this topic has been addressed many times over the years, but I'd like to revisit a suggestion which may have more validity since the changes in buying BGs (no rank tiers, etc.) and the introduction of the "Attack HQ" function.

Currently, the HQ Attack runs on a 30 minute timer. Considering it is now generally accepted policy in the game to return to your home city during wars, it is reasonable to conclude that HQ Attacks in the right hands can do tremendous damage to an entire crew's defenses in a very short time.

The analog of this, and the reason I brought it up, is because I would like to suggest reducing the BG wack timer. I understand an initial aversion to it as BG wacking has been the same for years, but I don't see a legitimate reason to keep it where it is now. The general atmosphere of the game leans more towards shooting through BGs with cannons rather than shooting at BGs with a group of hitters. I think a reduced BG Wack timer would empower groups of lesser-trained guns. Because of this, anyone who can't shoot through a tremendous number of BGs is either an expendable proer or responsible for "cleaning up" undangerous targets.

To complement this, I would also suggest that the maximum number of BGs which can be killed be reduced. This is to promote using non-cannon guns, so by reducing the max BG kills per shot from 5 to 4, or 5 to 3, less-trained individuals can contribute a lot to fights.

In addition to this effect of expanding the scope of "who can help" in wars, I think this would also alleviate some of the frustration with individuals at the BG cap. If we increase the overall damage of a crew's BG hitting structure, I think some issues with the BG call would be remedied. If this change were actually made, I don't think we'd necessarily need a BG cap, as Bodyguards won't take as long to kill off (but if this change were also made, we'd need more BG-amount tiers like "Absurdly Well Protected" or "Ridiculously Well Protected").

I would entertain responses from anyone who has seen this suggestion before and provide some counterarguments, because I'd like to see the timer at 45 minutes (and reduce the max BG damage to ~375) or even down to 30 if we were to reduce the max BG damage to ~250. Then individuals who do 200-300 damage would be able to provide substantially more, and make "BG waving" a more beneficial endeavor. 

Personally I think the timing on bodyguard shots is fine - my main reason for posting here is to correct what you've said. As I used to have a godfather account with a ridiculous amount of kills, I can tell you that the most you can do to fully trained + healed bodyguards is kill two in one shot. So yeah, you have the 'max BG damage' (as you put it) wrong :)