Tell me about steel core .303...

use a magnet on them if it sticks it has a steel core. good for outdoor range. I had a friend take some to an indoor range. The ro was not too happy with him.
 
I never understood that. From everything I've read (or seen, when I had an SKS) the mild steel cores did no more damage to steel plate than jacketed lead.
 
.303 cartridges were not loaded with mild steel cores. Invariably they have a lead alloy core with fibre or aluminum tip. If there is a steel core, it will be hardened, and the round will be an armour piercing one. In .303 headstamp codes, B is blank, G is tracer, P is incendiary, and W is armour piercing. British and commonwealth .303 cartridges were invariable loaded with two jacket materials; cupro-nickel - silver coloured - and, guilding metal, copper-zinc - copper coloured. .303 ammunition may have been made elsewhere with copper coated steel jackets. It is not uncommon for full metal jacketed bullets to be referred to as steel jacketed bullets, even though they are not.
 
mg34 said:
steel core ammo will go through anthing metal as i used to shoot 8mm ap until they banned them.
Click to expand...

Not so, my friend.
AP is banned in pistol, but not in rifle.

Lake City .30-06 AP black tip versus 7/8" mild steel plate.
P7100174.jpg
 
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