Originally Posted by nickw
I can check for the rifling again, will it be pronouced?
If I just stuck my finger in and felt around would it be obvious?
Yes, very pronounced; only at the bottom (crown) end. The top part is of course plain to accept the stem. You will see it or feel it with your finger; the spiral ridges are at least 1mm. high and about 3mm. accross and I think there are six of them.