oh just thirty years of experience.
these home made snap caps usually last for about 85 to 100 strikes.
85 strikes is not very durable. I have a set of A-Zooms that each easily have 300 strikes on them and there is virtually zero noticeable wear on their strike face or their aluminum bodies. The low cost of A-zooms (less than $2 per snap cap) makes building my own less durable snap caps just not worth the time or effort.