I know that it's not the best surplus ammo out there, but it's the cheapest. https://www.midwayusa.com/product/1021569944?pid=290772&utm_source=military-surplus&utm_medium=email&utm_content=main-image-link&utm_campaign=surplus-saturday The biggest problem with POF is hang fires. You can reduce this by letting it sit in the sun or shooting it on a hot day. The only other Surplus 303 ammo I know of it at SG Ammo. They have MEN (German made) 303 from the 80's for $12.95 a box of 20 ($0.64 a round) or $300 for a 500 round can. ( $.60 a round) https://www.sgammo.com/product/303-british-ammo/20-round-box-303-british-surplus-ammo-174-grain-bi-metal-fmj-1980s-vintage- Compared to new manufactured ammo which will cost you about $0.80 a round, surplus ammo is still a good deal.