I hunt a couple of the Navy bases in VA pretty regularly, when I'm in the country. Due to the rules on these particular bases, buckshot is all you can use other than archery eqpt. Buckshot is effective if you keep the range to a max of 30 yards. I'd rather use a slug gun or my 6.5x54 Mannlicher, but it wouldn't be legal on the base.

I took this buck off one of the bases last year. If you look on his side you can see where the pellets hit him. They were 00 Buck and they tipped him over on his nose.