It's just got a long throat. A lot of rifles have a throat that is so long that you can't get close to the lands with the bullet. I'd load it as long as I could and still cycle through the magazine.
The standard OAL for the .270 Win is 3.340"
Are you using a very light (short) bullet?, as 2/10" longer than std OAL isn't all that bad.
If some is good and more is better, then too much is just right.
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