If your running a hotrod,short barrel life cartridge cost savings in bullets don't add up. Buy a premium bullet in bulk(1000) @ .25/ shot. Or buy a cheap bullet at .18/shot. You saved 70.00, the barrel blank 350.00+300+ gunsmith. Might as well shoot the premium bullet. Now if you buy a Savage 223, shoot prairie dogs with it, 5 trips 500 rounds each. And you brought 5000 Speer TNT at .09 each you saved 400.00, enough to order a new premium prefit for the last 2500 bullets that will probably shoot better on the next 5 trips. And you had bullets through the next pandemic.