Papa, those look max shiny for any hand pour cast metal. IMO the Do-it mold surface texture is more lifelike than a mirror smooth chrome plate which does not exist biologically. Pure tin castings look a bit shinier, but that may be due to a slight goldish tinge rather than the blue gray of lead.
Main advantage of linotype is extreme hardness, which is also its disadvantage for jig head casting. I gave up on it after failing to find a clean & efficient way to remove the sprues, particularly on larger castings. Due to the abrasive hardness break scars or seam flash would be best filed off. The surface appearance is matte with the high antimony component setting into the surface finish with a grainy texture, & the significant tin component appearing to promote a settling effect. Like Redman says, the cast surface is more resistant to oxidation tarnishing than softer lead if left unpainted. RotoMetals version of linotype is Pb84 Sb12 Sn4 where Pb=lead, Sb=antimony, Sn=tin, and the original might have had a higher Sb of 16(%).