Scott - All my LR Lupy's on my rat rifles wear the Alumina alloy caps....love 'em.
One thing I really like about them, besides the fact that they seal perfectly (o-ring seals w/rare-earth magnets), is that they fold flat so as not to obscure the shooters downrange vision. The critters I mostly shoot are dinky little guys, an objective cap could hide an entire colony at 300 yards!
Spendy, yes, but worth it? Depends on your budget I suppose, but they are about the best scope lens covers I'm aware of; very well made. I usually put my come-up charts for each rifle in the ocular cap so I can get instant correction data after ranging the target for pretty good first shot hit probability.
The shot above is my Cooper 223, or "Rosa" in 223. One thing for sure, if you put Alumina's on yours, they'll be the last scope covers you ever buy for that scope. Oh, and "Scooter", my Cooper 20VT says 'hi' back.......
