I don't get it... kaboom as in a little more kick or kaboom as in it blew up your pistol? All that will happen is more pressure will be created, +p or maybe even +p+ but a quality firearm will be ok.IMO its worth the $5 to $10 a year to insure my gun doesnt go kaboom in my hand. The cost associated with only chambering a round once is not worth is. Thats assumming you can find the ammo to replace it with.
I have never heard of a round with a little setback blowing up a modern firearm!