Bullets will need to be seated deeper in the blr if you are using reloads. Mag length will prevent you from setting the bullet closer to the lands.
But you would have a 270 lever! You could get a 270 wsm in the blr.
Same with the Tikka. depending on the bullet you may not be able to seat near the lands. 130gr SST come to mind.
For what it's worth I love my Tikka T3
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