For me, sandwich meat would be anything such as sliced turkey or chicken, sliced ham, bologna, sliced roast beef. Yes -- luncheon meat.
I usually only buy ham in the sliced form and of course tinned luncheon meat if I do meat sandwiches I usually use left over meat from the Sunday roast.
Yes I am old fashioned and still have a traditional British Sunday roast each week. I find it most economical, cold on Monday with either hot veg or salad stuff and then on Tuesday if enough left over similar or not make what is left over into stir fry or something else.