ASCE 5th PrintingP. 84The rule as written works as intended for crit rolls vs Exceptionally Large Units and Protomechs. However, it has unintended interactions with the Mech and Combat Vehicle Critical Hit charts.Versus Mechs it decreases the likelihood of rolling a critical by 8.3% while increasing the odds of ammo explosions by 300%, increasing the overall likelihood of catastrophic critical and/or extra damage by 50%. Versus Combat Vehicles it both increases the likelihood of critical damage by 8.3%, and increases the likelihood of ammo explosion. Thus having the opposite effect of its intended purpose.Possible solution - simply ignore critical rolls of 11-12. Ensuring that the likelihood of critical damage is reduced by 8.3% while also reducing the likelihood of catastrophic damage by 50%.