Oh so infantry weapons always have 100 percent accuracy versus tanks and vehicles?
what does the size increase change to kubel do?
Infantry small arms usually have accuracy values between .3 and .7, so the former target size of 10 on the Kubel brought those to 3 and 7, meaning 300%-700% chance of hitting.
Anti Tank weapons are more like between .025 and .05, meaning at size 10 25%-50% hit chance brought up to 35%-70% at size 14. I believe the larger size also means a "miss" roll is more likely to hit anyways due to scatter.