.44 Henry Flat Long

Am I correct IDing these?. H is Winchester and U is Remington, Both are 11x23mm.

DSCF3350

Yes, they are flat long, but the U likely indicates Union Metallic Ctg Co here, as Remington (who as UMC’s successor used the U) made far fewer of these than UMC. The WRA round with the raised H in a depressed circle is fairly early. Jack

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