As I went to my local Wally world and all they had were 20 ga slugs, some birdshot and some 7mm rds. No 12 ga of anything. So, I bought 3 boxes of Winchester 20 ga rifled slugs 3/4 oz. $5/box. Has a picture of a deer on the front. So, I guess they'd do for self defense if need be. They also had the Remington value pack.....15 5/8 oz slugs for $12.00. Any difference between the 5/8 oz and 3/4 oz slugs except the amount of lead? One better for SD/HD?