When they first came out with the magnum caps some people claimed that they enlarged their groups. I haven't heard anything about that for several years. I can't tell the difference between the magnum and regular caps when shooting.I shoot what ever I can get with no problems.
They'll work just fine on any #11 nipple like said above.
About the only difference you may notice is that they can tend to blow apart so much that they get stuck in the hammer cup. On my Renegade they get stuck more than they don't in my experience. Probably has a lot to do with cup to nipple fit too though, may be fine on yours.
I fire these in my production pistols with factory nipples and with sliyx shot nipples if there a little big I give it a little pinch, hay in these days I buy what ever I can get at a so called reasonable price. Go for it you will be fine..
The only difference I have seen between the normal and the magnum caps was in a pistol that was designed to stop the hammer fall just before the hammer contacted the nipple but would fire the caps. There was enough wear in the hammer cavity that a CCI #11 cap would not fire but the CCI #11 magnum cap would fire.