O yeah they do produce a ton of mescaline!
My plants are like my babies tho so I rarely eat them, lol. I usually just take a couple of matured dried out heads and brew up San Pedro or P.Torch as they are only £20 for a 12inch cutting here in England. I find the Caespitosa breed grows so much quicker but the heads do not have the thickness to achieve significant weight for tripping but they do look so cool when they start producing pups all over the place
For me cultavating this sacred cactus is a great honour and service to the great spirit/mother earth and in return they look after me.
In terms of actual ceremony/trip I find combining different compounds to be far more potent, so I'll take a couple of 3cm Caespitosa's, 2x3cm L.Decepiens and then the Pedro and if I'm really lucky some LSA or psilicybin
I don't want to sound arrogant but if you haven't done this before go easy as it can be very heavy/enlightening experience. I honor the plant spirits before and experience for safety