I have a 1911 45cal pistol which I use whenever there's a shootfest. Recently I decided to shift to .40cal modified. I purchased the upper assembly of the firearm and fitted it to the same frame (45cal). When we join matches we usually sign a waiver and it also serves as our PTT. Should I write 45cal in the information sheet even if I'll be using 40cal in the match? Will I be questioned why I put 45cal instead of 40cal or vise versa? Please note that my firearm license is for a 45cal. Will appreciate advices from senior professional shooters. Thanks.