I have the new Mossberg 835 Ulti-mag 12 ga. 24" barrel, 3 1/2 chamber. It came with a super full choke(factory).

My question,(Turkey Hunting)

What is the best size shot to use with a Mag. gun 4,5,6 and what size shell? 3 or 3 1/2?

also, will the factory choke be good enough or should I purchase a better quality one?

I know I should buy several different loads to pattern my gun but anyones insight would be greatly appreciated!

Thanks,

Hollywood