Is this a Springfield barrel?

[Remo]

Help,
Bought an M1903 that has been sporterized and the seller insists the barrel was the original barrel. I don't think so. I think it maybe a Winchester barrel taken off a sporting rifle. The only marks are as depicted. However it is 30-06 caliber. Thoughts
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Information

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[Salt Flat]

The contour looks like 03 springfield. Look for the rear sight indexing pin location. This would be at about 2:00 when viewed from yhe shooters position. I think the "P" on the barrel is indicative also. It probably doesn't doesn't matter much as it has been totally modified. Still good for a sporter though if the bore is good.

[Remo]

Thanks, I think after looking closely again you are right. the index pin mark was where you said, faintly visible.

[Promo]

Desolder the front sight. Maybe the original markings are still visible under it.

[Calif-Steve]

Looks like someone turned it on a lathe. Not so sure marking still visible. I do suspect it is GI.