I recently bough a Sako 75 in .308 that has been screw threaded. I was told simply that it was threaded 1/2" UNF. I have a thread protector from my CZ rimfires in the same thread that fits the Sako thread easily.
So today I go out and buy a moderator with said thread - it doesn't fit! Starts to bite for a full turn then sort of jams. I've not forced it. I took the moderator off and it easily screws on my other rifles cut 1/2" UNF.
So as I see it one of two things are going on:
1. the rifle is cut to a different thread
2. the rifle thread is somehow damaged
Anyone got any suggestions of what the thread may be? My searching would suggest these were not factory cut so it could be anything! (I have also contacted the chap I bought it from)
Thanks in advance!