Anyone have a link to the big gun rule book? I tried searching but didn't really come across what I was looking for... Thanks!
Well to be more precise I'm looking for rules on sub construction/armor thickness/armament/pumps stuff like that
Those are likely to have some minor variations, but... I think the most common in north america is the NTXBG rules, try: NTXBG Homeport - Welcome! | Rules (yes, their SSL cert is expired, their site is currently fine to visit)
For additional rulesets to compare, if you are interested: Midwest Battle Group (now defunct) last known rules. Western Warship Combat Club web page with links to rules.
Nathaniel Hi Big gun is a term that was adopted for simplicity. It's sorta like Fast Gun which has a few groups also. I will put it this way. Fast Gun are clubs that use standard BBs Big Gun are clubs that not only use BBs but, 3/16, 7/32nd and 1/4 inch ball bearings inclusive. The group I am with Pacific Model Warship Combat Club, uses 3/16 and 1/4 inch shot only. We would also be considered under the Big Gun umbrella.