not sure if this is the best section but here goes.
I have an overbarrel PES moderator that I purchased at vast expense some years ago for use on a Sako Quad on a variety of rimfire rounds from .17M2 to .22WMR. works like a charm
As I am in the market for a .243 I had the idea in the back of my mind that when I bought it he said it would go up to .2xx calibre but couldn't remember the xx part and assuemed it would be 223/222/22-250 etc!
Quick call to Steve Kershaw who sold it to me and it appears I am in possession of a 7mm (.2755) bored moderator! (quick check with a 7mm drill bit shows that it can be nothing else)
Not only is he very confident that it will work on the .243 it may even work better than the 7.5 or 8mm bored(.30 cal) moderators often used due to the smaller bore!
Apparently .83mm or .0325 clearance is perfectly fine (and have just read about a chap who used an 8mm bored mod with a .308......0.006" clearance!!! bit close for me!)
I need a new delrin spacer for the over barrel part cut to the barrel diameter of 243 and to get it checked over for concentricity / 90 deg shoulders etc but that is pennies compared to a new mod!
Think I have just saved myself £200+
Now I started thinking.
My FAC lists a "small bore" moderator when it appears I have a "full bore" moderator.
apart from the ridiculous situation that allowed me to buy it in the first place I technically have something incorrect on my FAC.
L&B FLO were very helpful and all I have to do is write in and explain what I have and what it should read.
I also will have no restriction to using it solely on the 243 once swapped to FB status.
One size it appears does fit all!!