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Tuning tunes for M3 .25 slugs

Daniel, welcome.

I would suggest trying the factory FX settings as a good place to start. No downside, just gives you a benchmark on where to go toward the tune you are hoping for. I assume , pardon me if I'm wrong, you have read here on many posts that there is no "magic tune" that some have shared here that will work in "your M3". Have fun tuning and share your failures and successes.

Patrick