Pure competition pcp like TM1000 and Thomas don't use LDC. WHY?

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Just to keep updated, these were some of the groups shot right after Mod and CF sleeve removed. No special attention or true Benchrest set up.

Mind you I only shot about 5 groups of 7 shots each these are honest groups not just the best of…
 
Really I need more time to shoot when it warms up here in Mi., it’s been cold and very windy all spring. But initially I would have to say the same or a slight improvement?

Honestly I like shooting the gun without the Moderator the noise is the only factor for shooting with one in my area. The sleeve I could care less one way or the other. Let me add my sleeve on this gun was loose from the beginning I could turn by hand. So not sure that it accomplished anything? To make a difference I would believe it should be permanently attached.