The following p6 oscillator with a minimum population of 27 cells, which can be combined into big six shooter stacks. Discovered by Josh Ball.

big six shooter.png

x = 11, y = 13, rule = s0/b2
bo7bo$bo7bo$bo7bo2$2bo5bo$o3b3o3bo$5bo$o3b3o3bo$2bo5bo2$bo7bo$bo7bo$bo
7bo!