Old eyes love scopes and peep sights. Sight adjustment is easier and much more accurate with a "click" adjustable peep then with stock open sights. I use several of them:
Lyman 66A on Win. '94
Stock military on Enfield Mk 4 #2 and a 1903A1.
Lyman 57 on sporterized 1917 Enfield 3006.
T/C "ladder" sight on Investarm Hawken.

I only use a scope on a 3006 for long range. Guns with peeps are much easier to carry and faster to use for folks that used open sights for years.