I am new to the forum but have been shooting a 10 ga for close to 15 yrs. I shoot a BPS with 26" barrel and a IC .690 with Nitro Mega Weights in 4x5x6x7, I saw you talking about straight 6 Mega Weights and 6x7 Mega Weights, do you have to ask for these special from Nitro? I have not seen them listed in their catalogue. BTW, I get 280-290 in a 10" circle at a lasered 40 yds. will polishing the bore help enough to warrant the effort and expense to do it?