These are the first HS bullets made before the rights were sold to Federal. They look like Lead 148gr. hollow base wadcutters with the post in the center. I have had a box of 500 since 1970 . These are just the bullet which you can load yourself. I have heard 4.8 grs. of unique and this bullet will open to .50. I will ship you 50 for free if you will test them and post the results. They are not for sale and I will ship only 50 for free to the first taker to test and post the results. Thankyou,Jeep.