You are cocking both hammers. With no shells in the gun, snap both hammers. Then try to open it. If it feels the same(hard) the firing pins are not sticking in the primers. If it's not hard to open with the hammers cocked but no fired shells in the gun, the hardness is just in cocking the hammers. If it IS hard to open with the hammers cocked, try opening it with the forend removed. If it opens easy now, the forend is too tight. Very common with Browning Citoris. If this is the case, stone a little bit off the butt side of the forend lug, until it opens a bit easier with the forend in place. Do this in a logical manner. Don't jump all over the place on suggestons from people who don't know anything about break-open guns. No offense directed toward anyone.
