Found at a friends store, a box of reloads, headstamp Winchester 220 Swift, bullet is .30 caliber.

Any ideas as to what, if anything, it should be called?


Thanks, Rob

You can make 303 Savage brass from 220 Swift. Does it resemble 30-30?

I have .303 Savage and it's rimmed. The 220 Swift is rimless.

Here's the .303 on the right and the mystery .220 on the right.

It looks like the the 7.35 carcano. roger

Rimmed, semi-rimmed or rimless don't matter. People still make 303 Savage from 220 Swift. Bartsche probably has it right.

quote:

Originally posted by Marc:
Rimmed, semi-rimmed or rimless don't matter. People still make 303 Savage from 220 Swift. Bartsche probably has it right.

How can that be, the shoulder height difference is almost 1/2"?

I believe as does Bartsche,it is the 7.35 Carcano.

If you can measure the bullet ,it should mic. .299-.300.

WC

That's exactly what the bullet measures, .300.


Thanks, Rob

Rob, I have never converted Swift brass to 303 Savage so I don't know for sure. Since the 303 has a soft shoulder and you aren't reducing the diameter that much, I would think you could just lube the 220 case well and slowly push it into the 303 die.

My old hunting partner gave a 303 Savage to his niece and his brother bought ammo that had been made from reformed Swift brass. He said it worked fine.

The rim of the 303 Savage is .505" and the rim of the 220 swift is .473" that a lot of slop in the boltface fit.

The 220 Swift was made from the 6mm Lee

I guess it depends on how deep the extractor bites. Some people can use 308 brass(.473" rim) in 307 and 356 Winchesters(.505" rim). 308 brass does not always extract in my 356 Win but rifles vary.

I shoot a 6mm Lee Navy and Frank is right about the 220 Swift being made from the Lee.

However the Swift was modified slight -- the neck was trimmed and the case head was strengthened to take the higher pressures.

For years, I necked 220 Swift up to 6mm and they functioned through my Lee Navy rifle just fine. Then I found that Buffalo Arms in Montana makes 6mm Lee Navy brass and bought some from them. They use a 25-06 as the starting case, turning the head etc.... and now my 6mm Lee brass has the proper neck length!

Barstooler