is over sizing a moderator a no-no?

.25 threw a .30 ..... Just a tad more noise due to the pass threw holes larger size.

Ive got a 30 on my 25, works fine. I cant tell any difference honestly. And on the plus side, you got a total of .050 less chance of clipping!

i run 30 cal mods on all my 25 guns.

I have a .30 Ronin on my .25 Flash and I'm very pleased with the performance. 

I do believe if you contact Ramus directly, they can sell you new cores for the Trident. The aluminum shell/cap itself, at least on mine, appears to be correctly sized for .30 caliber even though the core is for a .22. So it is conceivable you can have your cake and eat it too for just a little extra cash, starting with a .25 and getting a .30 core should you wish to make the switch further down the road. 

How much louder a mod will be because it is over-bore can vary dramatically by design, some see very little increase others lots, but I have no idea where the Trident would fall on that spectrum. Either way though it is a great design, one of my favorite production mods for sure. Lightweight, stylish, the core is at least reasonably modular, and it is pretty innovative. Definitely not just another "me too" design. 

On my larger ones, it doesnt seem to matter. Smaller ones are MUCH louder when shooting a smaller projectile thru. I'm talking overall size of the LDC

I purposely run one caliber size larger with my moderators. Absolutely eliminates any chance for pellet clipping, etc.

Aoa wanted to sell me 1 core for like 105$ ,lol nope.

If Ramus will sell you one it should be cheaper.The trident I had was nicely built and fairly light.