no problem with any 'optic' as to "cross hairs" some liek the traditionla, some like the post, etc,,,,but its when one "magnifies" ( puts power) to a 'long eye relief' scope like the one you have and I know of few that could possibly hold the gun steady enough, at arms length, in bullesyes shooting, and the scope does NOT dance around , ala 'St Vitus' dance....jumps, wiggle, call it what you will, but nothing over 1 or 1.5 x can the average human hold out at arms length and KEEP the focal point ( crosshairs) on target...two guys come to mind, both were power lifters, had grips like a vise and arms like Arnold "used" to have, and they too had a hard time keeping one of those scopes "steady"...... a scope, little or no power, crosshairs ONLY or a red dot (internal) will do the job....yes, some like the "added" weight that a scope or larger optic gives them, but you can do the same thing by taping a roll of nickels under the barrel,,,,,and cheaper too....just MY .02 cents..do and use what works for you.
exactly what 'pinecone' stated above, the customer probably "thought " thats what he needed, until he got it, and actually tried it............
bottom line, still a great lokign and most likely a fine shooting gun, the Clark guns always were, optic or no optic...I used 'iron sights'......