Do you know what type of shotgun the landowner uses? Is it a vintage side-by-side with only 2-¾ inch chambers? If you don't know, don't buy him ammo - you/he can't return or exchange it if it's wrong for his firearm or application. Stick to a gift card so he can get something he can use.
I just purchased a new Swarovski Z8i 2.3-18x56mm with the illuminated BRX-I reticle. It's mounted on a new Weatherby Mark V ultra lightweight 6.5-300 Wby Mag rifle. I like the BRX-I reticle and the illumination. For long range competition, I use my Schmidt & Bender PM II's in either 5-25 or...