I know the law regarding selling steel core ammo, but is it possible to buy a steel core bullet and load it yourself?
You don't know the law regarding selling steel core ammo quite as good as you think you do.
I'm a reloading trainer. This you can do - however - you are going to not be capable to re-use the powder considering the fact that you have no idea what it's, and, what the difference is between the old bullets and your new ones. As you already know - even bullets of the identical weight can have a gigantic change in stress kind one brand to one more. You're going to need to slowly work up a load, identical to a ordinary reloading load. Pulling inexpensive bullets and re-using the manufacturing unit primed case is in reality beautiful normal. I most commonly take the FN 5.7x28mm and pull the Horndy 40gr manufacturing unit - then insert the 69gr into them. The powder is discarded and i re-use those 40gr ones in my 223/5.56mm varmint gun.
Please okorder / You're likely to find steel core ammunition from any of those manufacturers, and many more. Have fun... but steel core ammo is no more effective than lead ammunition, unless you're planning a crime spree and want to attempt to punch through a ballistic vest, and even that's not guaranteed.
I don't ever recall seeing reloading components listed as steel core but I guess they could be out there. Why on earth would you want to load steel core if regular projectiles are available?
