Some companies introduce a widened angular ejection port which makes it easier to feed one cartridge. they always keep the target in their sight and the T3x models have extra screw placements on top of the receiver so that they can robustly attach and even when using larger scopes. The extra strong lug has smallest deformation and even with larger calibers, the steel lug does not have strong imprinting qualities which cause deformation when larger calibers are used. All Tikka rifles are engineered and manufactured and they take pride in their products and deliver what they promise and every rifles has to go through accuracy testing to prove the rifle perform under one MOA accuracy prior to being sold anywhere. Tikka T3x and Tikka T3x accessories are both innovative and durable but most importantly and can be relied on under any condition or situation. To find the right rifle is never a simple job.