The 788 in 22/250 is a whale of a rifle as long as you don't have blinders on. First of all is the accurizing that is done on most guns of free floating the barrel, glass bedding the action, and replacing the trigger spring with a .168 dia ink pen spring which will give you a 2-2 1/2
pound trigger pull.
I hunted yotes with several in the 80's, loaded with h4895 with 55g Sierra Sp and Sierra 55g BTHP, 1/2" groups were easy, copper fouling was expected so de-copper after every 50 rounds...you are good to go on 300 yard shots.
Magazines are still around on several aucton sites, no worries as long as you are not broke, I never had more than one....I like living on the edge.
788's are getting some age on them....be careful. Barrel life of a 22/250 in chrome moly of that age can be short due to rusing out in the last 1/2" of the muzzle. If the gun comes from back East, then the barrel can have some rust in it due to humidity.
I have really massacred more than my share of small creatures with a 788. One rifle in particular I will never forget in 22/250, you could not miss a coke bottle at 300 yards with this rifle with a load of 34.5g of H4895 with a 55g Sierra Sp.
If you have the chance of getting this rifle in great condition at a price of say $350, then buy it. Email me and I will walk you how to re-spring the trigger.