I have a tikka superlite 6.5 with the m+ mag. I can only load the 156 eol at .120” from the lands. That’s at 2.965“ max mag length.A McMillan Hunters Edge for the T3X weighs about 24 ounces, comes with pillars installed. Calling @Oregonmuley for pics...
The M+ magazine allows a COAL of about 2.9" which is plenty for the 6.5 creed with the 156 EOL. Don't know what you have? Just look at the top of the magazine, it will have M or M+ stamped on it.
I’m going to switch to long action mag And bolt stop And try to get closer to the lands.