I have a 300WM 110, staggered feed, small shank, pre-Accutrigger. Since I don’t use it much and I’m looking to get more into long range shooting, I’m thinking of building this rifle up.

This is what I have in mind:
26” pre-fit bull barrel, preferably in 6.5CM.
Aftermarket stock or chassis that allows use of AICS mags— leaning toward MDT.
Timney trigger.
Oversized bolt handle.

These are my concerns:
I know this action is a bit long for 6.5 Creedmoor, what kind of issues will that cause? Can the LA MDT chassis use an SA AICS mag?

Also looking for recommendations for the new bolt head.

Has anyone made this conversion? Any advice or cool pics would be welcome!