I bought one new when i bought my Tikka 243 new.
I have had lots of trouble with mine.
First problem after less than 12 month's use the 14/1 thread became very tight when trying to screw the moderator on the rifle, it wasn't the rifle threads, it was the moderator threads that had sort of shrunk i had to have these's threads re cut ----this has had to be done twice now over a period of time.
The second problem is the baffle end of the mod, this is a sort of inverted funnel shape and the flame/hot gasses hit the end of this as well as going through, this burn's this funnel and miss shapes it, if you don't re file and de burr it, it will foul the bullet as it goes through.
In fareness to Wildcat, they did replace this baffle part free of charge, but the replacement has started eroding away just like the original. (wildcat are aware of this problem and blame Hornady 58g v-max ammunition i was using)---------to me the design is wrong, you want the hot gasses going "through" not onto the baffle.
Lastly, i am told that they have stopped selling spare parts for these's now.
On my 22-250 i have a ASE ultra sl5i, this has been no trouble at all and its a moderator that i would recommend.
Dave (warbucks)