There are benefits to both options. Your individual needs can help you decide which is best for you.
A mini chassis offers convenience such as bolt-in and go shooting and the ability to swap barreled actions. Since there is no gunsmithing required, you are able to quickly install your new stock and hit the range. If you are building a dedicated competition rifle or a custom hunting rifle that you are trying to keep light, we feel that a fully pillar bedded action is best. Pillar bedding will ensure that your action is fully stress free.
The optimum chassis design would be a 100% full contact chassis that supports 100% of the action area. Unfortunately, this is virtually impossible to achieve because of the wide range of actions now available. Even though each action is machined to very tight tolerances, it is impossible to have a chassis that will ensure a 100% stress-free fit because of variations in diameter and shape.
To account for these variations, the MCS Mini Chassis is designed like a V-block. It actually pulls the action down int0 the V-block to ensure no movement and constant accuracy and repeatability. The action will only contact the chassis at these points: 1) the back of lug, 2) from the back of the lug to the front of the mag well at about 4 and 8 o’clock, 3) from the back of the mag well to the end of the tang at 4 and 8 o’clock, 4) around the rear action screw, there is a small crush ring support that reinforces the tang.