Bonanza,
Some people get their finger bashed others do not. I have one friend that has a 470 Chapuis that bashes his second finger on the back of the trigger guard. When shot by me and another buddy we do not get bashed.

You might try this, Besure you have a FIRM grip on the pistiol grip. Be sure you press the second trigger while maintaing your FIRM grip on the pistol grip of the stock, and firm pressure into your shoulder. If the front trigger is bashing you finger when you shoot the second trigger, you might be relaxing you grip too soon.