The federal 510b that walmart sells (sold) comes in 50 rd. boxes with dividers separating each round. It has lead (not copper washed) bullets with a very nice lube on them. it isn't bulk ammo, although it sold for slightly less than the 550 pk of plated federal bulk bullets. The last I bought cost $14.70 for 500 rds. The 510b is a very good high velocity (1240 fps) round. Every .22 I have shoots it very well. I would buy it over the Winchester, but Winchester ammo has been good for me also, though not my preferred. I wouldn't sell or trade any .22 ammo I had, because it would be expensive to replace. Like everyone else says here, keep the ammo and do what else is needed to get holster money.