I have looked in some detail into moderators, in particular the weight and length (I am looking for a light-weight and short moderator) considering the materials used and the price asked. As the amount of Posts on this site indicate, a confusing subject, as there is no industry benchmark test and the amount of moderation also depends on the type of round/load. However the majority of manufacturers claim a moderation of between 25-28 Db - no manufacturer seems to be able to improve on that range or falls below it.
Having decided on the manufacturer I wonder if the moderator for the .308W rifle can be used on a .243W rifle without any significant reduction in moderation. (The barrel screw threads are, btw, the same on both rifles, yes I did check!). Obviously, one would expect a .308W moderator on a .243W rifle to be slightly less effective than a .243W moderator on a .243W rifle.
But...by how much????
Thank you for sharing your views and experience.